diff --git a/NEWS b/NEWS
index beb44d5f..98b49205 100644
--- a/NEWS
+++ b/NEWS
@@ -17,6 +17,10 @@ NEWS ( CHANGELOG and HISTORY )                                     HTMLPurifier
   HTMLPurifier.php is insufficient--in such cases include HTMLPurifier.autoload.php
   as well to register our autoload handler (or modify your autoload function
   to check HTMLPurifier_Bootstrap::getPath($class)).
+! Extra utility classes for testing and non-library operations can
+  be found in extras/. Specifically, these are FSTools and ConfigSchema.
+  You may find a use for these in your own project, but right now they
+  are highly experimental.
 - Autoclose now operates iteratively, i.e. <span><span><div> now has
   both span tags closed.
 . Plugins now get their own changelogs according to project conventions.
diff --git a/extras/ConfigSchema/DirectiveParser.php b/extras/ConfigSchema/DirectiveParser.php
new file mode 100644
index 00000000..068c2bad
--- /dev/null
+++ b/extras/ConfigSchema/DirectiveParser.php
@@ -0,0 +1,10 @@
+<?php
+
+/**
+ * Parses directive files, building up object representation of 
+ * configuration directives for runtime use or for documentation.
+ */
+class ConfigSchema_DirectiveParser
+{
+    
+}
diff --git a/extras/FSTools.php b/extras/FSTools.php
new file mode 100644
index 00000000..3cc6023a
--- /dev/null
+++ b/extras/FSTools.php
@@ -0,0 +1,152 @@
+<?php
+
+/**
+ * Filesystem tools not provided by default; can recursively create, copy
+ * and delete folders. Some template methods are provided for extensibility.
+ * 
+ * @note This class must be instantiated to be used, although it does
+ *       not maintain state.
+ */
+class FSTools
+{
+    
+    private static $singleton;
+    
+    /**
+     * Returns a global instance of FSTools
+     */
+    static public function singleton() {
+        if (empty(FSTools::$singleton)) FSTools::$singleton = new FSTools();
+        return FSTools::$singleton;
+    }
+    
+    /**
+     * Sets our global singleton to something else; useful for overloading
+     * functions.
+     */
+    static public function setSingleton($singleton) {
+        FSTools::$singleton = $singleton;
+    }
+    
+    /**
+     * Recursively creates a directory
+     * @param string $folder Name of folder to create
+     * @note Adapted from the PHP manual comment 76612
+     */
+    public function mkdirr($folder) {
+        $folders = preg_split("#[\\\\/]#", $folder);
+        $base = '';
+        for($i = 0, $c = count($folders); $i < $c; $i++) {
+            if(empty($folders[$i])) {
+                if (!$i) {
+                    // special case for root level
+                    $base .= DIRECTORY_SEPARATOR;
+                }
+                continue;
+            }
+            $base .= $folders[$i];
+            if(!is_dir($base)){
+                $this->mkdir($base);
+            }
+            $base .= DIRECTORY_SEPARATOR;
+        }
+    }
+    
+    /**
+     * Copy a file, or recursively copy a folder and its contents; modified
+     * so that copied files, if PHP, have includes removed
+     * @note Adapted from http://aidanlister.com/repos/v/function.copyr.php
+     */
+    public function copyr($source, $dest) {
+        // Simple copy for a file
+        if (is_file($source)) {
+            return $this->copy($source, $dest);
+        }
+        // Make destination directory
+        if (!is_dir($dest)) {
+            $this->mkdir($dest);
+        }
+        // Loop through the folder
+        $dir = $this->dir($source);
+        while (false !== $entry = $dir->read()) {
+            // Skip pointers
+            if ($entry == '.' || $entry == '..') {
+                continue;
+            }
+            if (!$this->copyable($entry)) {
+                continue;
+            }
+            // Deep copy directories
+            if ($dest !== "$source/$entry") {
+                $this->copyr("$source/$entry", "$dest/$entry");
+            }
+        }
+        // Clean up
+        $dir->close();
+        return true;
+    }
+    
+    /**
+     * Overloadable function that tests a filename for copyability. By
+     * default, everything should be copied; you can restrict things to
+     * ignore hidden files, unreadable files, etc. This function 
+     * applies to copyr().
+     */
+    public function copyable($file) {
+        return true;
+    }
+    
+    /**
+     * Delete a file, or a folder and its contents
+     * @note Adapted from http://aidanlister.com/repos/v/function.rmdirr.php
+     */
+    public function rmdirr($dirname)
+    {
+        // Sanity check
+        if (!$this->file_exists($dirname)) {
+            return false;
+        }
+     
+        // Simple delete for a file
+        if ($this->is_file($dirname) || $this->is_link($dirname)) {
+            return $this->unlink($dirname);
+        }
+     
+        // Loop through the folder
+        $dir = $this->dir($dirname);
+        while (false !== $entry = $dir->read()) {
+            // Skip pointers
+            if ($entry == '.' || $entry == '..') {
+                continue;
+            }
+            // Recurse
+            $this->rmdirr($dirname . DIRECTORY_SEPARATOR . $entry);
+        }
+     
+        // Clean up
+        $dir->close();
+        return $this->rmdir($dirname);
+    }
+    
+    /**
+     * Recursively globs a directory.
+     */
+    public function globr($dir, $pattern, $flags = NULL) {
+        $files = $this->glob("$dir/$pattern", $flags);
+        foreach ($this->glob("$dir/*", GLOB_ONLYDIR) as $sub_dir) {
+            $sub_files = $this->globr($sub_dir, $pattern, $flags);
+            $files = array_merge($files, $sub_files);
+        }
+        return $files; 
+    }
+    
+    /**
+     * Allows for PHP functions to be called and be stubbed.
+     * @warning This function will not work for functions that need
+     *      to pass references; manually define a stub function for those.
+     */
+    public function __call($name, $args) {
+        return call_user_func_array($name, $args);
+    }
+    
+}
diff --git a/extras/FSTools/File.php b/extras/FSTools/File.php
new file mode 100644
index 00000000..d17dce6a
--- /dev/null
+++ b/extras/FSTools/File.php
@@ -0,0 +1,85 @@
+<?php
+
+/**
+ * Represents a file in the filesystem
+ */
+class FSTools_File
+{
+    
+    /** Filename of file this object represents */
+    protected $name;
+    
+    /** Handle for the file */
+    protected $handle = false;
+    
+    /** Instance of FSTools for interfacing with filesystem */
+    protected $fs;
+    
+    /**
+     * Filename of file you wish to instantiate.
+     * @note This file need not exist
+     */
+    public function __construct($name, $fs = false) {
+        $this->name = $name;
+        $this->fs = $fs ? $fs : FSTools::singleton();
+    }
+    
+    /** Returns the filename of the file. */
+    public function getName() {return $this->name;}
+    
+    /** Returns directory of the file without trailing slash */
+    public function getDirectory() {return $this->fs->dirname($this->name);}
+    
+    /**
+     * Retrieves the contents of a file
+     * @todo Throw an exception if file doesn't exist
+     */
+    public function get() {
+        return $this->fs->file_get_contents($this->name);
+    }
+    
+    /** Writes contents to a file, creates new file if necessary */
+    public function write($contents) {
+        return $this->fs->file_put_contents($this->name, $contents);
+    }
+    
+    /** Deletes the file */
+    public function delete() {
+        return $this->fs->unlink($this->name);
+    }
+    
+    /** Returns true if file exists and is a file. */
+    public function exists() {
+        return $this->fs->is_file($this->name);
+    }
+    
+    /** Returns last file modification time */
+    public function getMTime() {
+        return $this->fs->filemtime($this->name);
+    }
+    
+    /**
+     * Chmod a file
+     * @note We ignore errors because of some weird owner trickery due
+     *       to SVN duality
+     */
+    public function chmod($octal_code) {
+        return @$this->fs->chmod($this->name, $octal_code);
+    }
+    
+    /** Opens file's handle */
+    public function open($mode) {
+        if ($this->handle) $this->close();
+        $this->handle = $this->fs->fopen($this->name, $mode);
+        return true;
+    }
+    
+    /** Closes file's handle */
+    public function close() {
+        if (!$this->handle) return false;
+        $this->fs->fclose($this->handle);
+        $this->handle = false;
+        return true;
+    }
+    
+}
diff --git a/extras/HTMLPurifierExtras.auto.php b/extras/HTMLPurifierExtras.auto.php
new file mode 100644
index 00000000..3a03d2a7
--- /dev/null
+++ b/extras/HTMLPurifierExtras.auto.php
@@ -0,0 +1,9 @@
+<?php
+
+/**
+ * This is a stub include that automatically configures the include path.
+ */
+
+set_include_path(dirname(__FILE__) . PATH_SEPARATOR . get_include_path() );
+require_once 'HTMLPurifierExtras.php';
+require_once 'HTMLPurifierExtras.autoload.php';
diff --git a/extras/HTMLPurifierExtras.autoload.php b/extras/HTMLPurifierExtras.autoload.php
new file mode 100644
index 00000000..f228c554
--- /dev/null
+++ b/extras/HTMLPurifierExtras.autoload.php
@@ -0,0 +1,7 @@
+<?php
+
+if (function_exists('spl_autoload_register')) {
+  spl_autoload_register(array('HTMLPurifierExtras', 'autoload'));
+} elseif (!function_exists('__autoload')) {
+  function __autoload($class) {return HTMLPurifierExtras::autoload($class);}
+}
diff --git a/extras/HTMLPurifierExtras.php b/extras/HTMLPurifierExtras.php
new file mode 100644
index 00000000..8a489307
--- /dev/null
+++ b/extras/HTMLPurifierExtras.php
@@ -0,0 +1,26 @@
+<?php
+
+/**
+ * Meta-class for HTML Purifier's extra class hierarchies, similar to
+ * HTMLPurifier_Bootstrap.
+ */
+class HTMLPurifierExtras
+{
+    
+    public static function autoload($class) {
+        $path = HTMLPurifierExtras::getPath($class);
+        if (!$path) return false;
+        require $path;
+    }
+    
+    public static function getPath($class) {
+        if (
+            strncmp('FSTools', $class, 7) !== 0 &&
+            strncmp('ConfigSchema', $class, 12) !== 0
+        ) return false;
+        // Custom implementations can go here
+        // Standard implementation:
+        return str_replace('_', '/', $class) . '.php';
+    }
+    
+}
diff --git a/library/HTMLPurifier/Bootstrap.php b/library/HTMLPurifier/Bootstrap.php
index 93ec6c84..fa5e7ce2 100644
--- a/library/HTMLPurifier/Bootstrap.php
+++ b/library/HTMLPurifier/Bootstrap.php
@@ -17,7 +17,7 @@ class HTMLPurifier_Bootstrap
     public static function autoload($class) {
         $file = HTMLPurifier_Bootstrap::getPath($class);
         if (!$file) return false;
-        require_once $file;
+        require $file;
         return true;
     }
     
@@ -26,10 +26,12 @@ class HTMLPurifier_Bootstrap
      */
     public static function getPath($class) {
         if (strncmp('HTMLPurifier', $class, 12) !== 0) return false;
+        // Custom implementations
         if (strncmp('HTMLPurifier_Language_', $class, 22) === 0) {
           $code = str_replace('_', '-', substr($class, 22));
           return 'HTMLPurifier/Language/classes/' . $code . '.php';
         }
+        // Standard implementation
         return str_replace('_', '/', $class) . '.php';
     }
     
diff --git a/maintenance/common.php b/maintenance/common.php
index 9def5a50..52e00453 100644
--- a/maintenance/common.php
+++ b/maintenance/common.php
@@ -8,145 +8,5 @@ set environment variable PHP_IS_CLI to work around this).';
     }
 }
 
-/**
- * Filesystem tools not provided by default; can recursively create, copy
- * and delete folders. Some template methods are provided for extensibility.
- * @note This class must be instantiated to be used, although it does
- *       not maintain state.
- */
-class FSTools
-{
-    
-    /**
-     * Recursively creates a directory
-     * @param string $folder Name of folder to create
-     * @note Adapted from the PHP manual comment 76612
-     */
-    function mkdir($folder) {
-        $folders = preg_split("#[\\\\/]#", $folder);
-        $base = '';
-        for($i = 0, $c = count($folders); $i < $c; $i++) {
-            if(empty($folders[$i])) {
-                if (!$i) {
-                    // special case for root level
-                    $base .= DIRECTORY_SEPARATOR;
-                }
-                continue;
-            }
-            $base .= $folders[$i];
-            if(!is_dir($base)){
-                mkdir($base);
-            }
-            $base .= DIRECTORY_SEPARATOR;
-        }
-    }
-    
-    /**
-     * Copy a file, or recursively copy a folder and its contents; modified
-     * so that copied files, if PHP, have includes removed
-     *
-     * @author      Aidan Lister <aidan@php.net>
-     * @version     1.0.1-modified
-     * @link        http://aidanlister.com/repos/v/function.copyr.php
-     * @param       string   $source    Source path
-     * @param       string   $dest      Destination path
-     * @return      bool     Returns TRUE on success, FALSE on failure
-     */
-    function copyr($source, $dest) {
-        // Simple copy for a file
-        if (is_file($source)) {
-            return $this->copy($source, $dest);
-        }
-        // Make destination directory
-        if (!is_dir($dest)) {
-            mkdir($dest);
-        }
-        // Loop through the folder
-        $dir = dir($source);
-        while (false !== $entry = $dir->read()) {
-            // Skip pointers
-            if ($entry == '.' || $entry == '..') {
-                continue;
-            }
-            if (!$this->copyable($entry)) {
-                continue;
-            }
-            // Deep copy directories
-            if ($dest !== "$source/$entry") {
-                $this->copyr("$source/$entry", "$dest/$entry");
-            }
-        }
-        // Clean up
-        $dir->close();
-        return true;
-    }
-    
-    /**
-     * Stub for PHP's built-in copy function, can be used to overload
-     * functionality
-     */
-    function copy($source, $dest) {
-        return copy($source, $dest);
-    }
-    
-    /**
-     * Overloadable function that tests a filename for copyability. By
-     * default, everything should be copied; you can restrict things to
-     * ignore hidden files, unreadable files, etc.
-     */
-    function copyable($file) {
-        return true;
-    }
-    
-    /**
-     * Delete a file, or a folder and its contents
-     *
-     * @author      Aidan Lister <aidan@php.net>
-     * @version     1.0.3
-     * @link        http://aidanlister.com/repos/v/function.rmdirr.php
-     * @param       string   $dirname    Directory to delete
-     * @return      bool     Returns TRUE on success, FALSE on failure
-     */
-    function rmdirr($dirname)
-    {
-        // Sanity check
-        if (!file_exists($dirname)) {
-            return false;
-        }
-     
-        // Simple delete for a file
-        if (is_file($dirname) || is_link($dirname)) {
-            return unlink($dirname);
-        }
-     
-        // Loop through the folder
-        $dir = dir($dirname);
-        while (false !== $entry = $dir->read()) {
-            // Skip pointers
-            if ($entry == '.' || $entry == '..') {
-                continue;
-            }
-            // Recurse
-            $this->rmdirr($dirname . DIRECTORY_SEPARATOR . $entry);
-        }
-     
-        // Clean up
-        $dir->close();
-        return rmdir($dirname);
-    }
-    
-    /**
-     * Recursively globs a directory.
-     */
-    function globr($dir, $pattern, $flags = NULL) {
-        $files = glob("$dir/$pattern", $flags);
-        foreach (glob("$dir/*", GLOB_ONLYDIR) as $sub_dir) {
-            $sub_files = $this->globr($sub_dir, $pattern, $flags);
-            $files = array_merge($files, $sub_files);
-        }
-        return $files; 
-    }
-    
-}
-
-
+// Load useful stuff like FSTools
+require_once '../extras/HTMLPurifierExtras.auto.php';
diff --git a/tests/ConfigSchema/DirectiveParserTest.php b/tests/ConfigSchema/DirectiveParserTest.php
new file mode 100644
index 00000000..933c123a
--- /dev/null
+++ b/tests/ConfigSchema/DirectiveParserTest.php
@@ -0,0 +1,7 @@
+<?php
+
+class ConfigSchema_DirectiveParserTest extends UnitTestCase
+{
+    
+    
+}
diff --git a/tests/FSTools/FileSystemHarness.php b/tests/FSTools/FileSystemHarness.php
new file mode 100644
index 00000000..228e986a
--- /dev/null
+++ b/tests/FSTools/FileSystemHarness.php
@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * Test harness that sets up a filesystem sandbox for file-emulation
+ * functions to safely unit test in.
+ *
+ * @todo Make an automatic FSTools mock or something
+ */
+class FSTools_FileSystemHarness extends UnitTestCase
+{
+    
+    protected $dir, $oldDir;
+    
+    function __construct() {
+        parent::UnitTestCase();
+        $this->dir = 'tmp/' . md5(uniqid(rand(), true)) . '/';
+        mkdir($this->dir);
+        $this->oldDir = getcwd();
+        
+    }
+    
+    function __destruct() {
+        FSTools::singleton()->rmdirr($this->dir);
+    }
+    
+    function setup() {
+        chdir($this->dir);
+    }
+    
+    function tearDown() {
+        chdir($this->oldDir);
+    }
+    
+}
diff --git a/tests/FSTools/FileTest.php b/tests/FSTools/FileTest.php
new file mode 100644
index 00000000..360c12da
--- /dev/null
+++ b/tests/FSTools/FileTest.php
@@ -0,0 +1,35 @@
+<?php
+
+require_once 'FSTools/FileSystemHarness.php';
+
+class FSTools_FileTest extends FSTools_FileSystemHarness
+{
+    
+    function test() {
+        $name = 'test.txt';
+        $file = new FSTools_File($name);
+        $this->assertFalse($file->exists());
+        $file->write('foobar');
+        $this->assertTrue($file->exists());
+        $this->assertEqual($file->get(), 'foobar');
+        $file->delete();
+        $this->assertFalse($file->exists());
+    }
+    
+    function testGetNonExistent() {
+        $name = 'notfound.txt';
+        $file = new FSTools_File($name);
+        $this->expectError();
+        $this->assertFalse($file->get());
+    }
+    
+    function testHandle() {
+        $file = new FSTools_File('foo.txt');
+        $this->assertFalse($file->exists());
+        $file->open('w');
+        $this->assertTrue($file->exists());
+        $file->close();
+    }
+    
+}
+
diff --git a/tests/index.php b/tests/index.php
index cb5d3219..b4c992a5 100755
--- a/tests/index.php
+++ b/tests/index.php
@@ -32,6 +32,19 @@ htmlpurifier_parse_args($AC, $aliases);
 // clean out cache if necessary
 if ($AC['flush']) shell_exec('php ../maintenance/flush-definition-cache.php');
 
+// setup our own autoload for earlier PHP versions
+if (!function_exists('spl_autoload_register')) {
+    function __autoload($class) {
+        return // we're using the fact that once one OR is true, the rest is skipped
+            HTMLPurifier_Bootstrap::autoload($class) ||
+            HTMLPurifierExtras::autoload($class);
+    }
+}
+
+// initialize and load alternative classes
+require_once '../extras/HTMLPurifierExtras.auto.php';
+
+
 // initialize and load HTML Purifier
 // use ?standalone to load the alterative standalone stub
 if ($AC['standalone']) {
diff --git a/tests/test_files.php b/tests/test_files.php
index 3ede3c3d..91ccf672 100644
--- a/tests/test_files.php
+++ b/tests/test_files.php
@@ -130,3 +130,10 @@ if ($csstidy_location) {
 
 // ... none yet
 
+// FSTools auxiliary library
+
+$test_files[] = 'FSTools/FileTest.php';
+
+// ConfigSchema auxiliary library
+
+$test_files[] = 'ConfigSchema/DirectiveParserTest.php';