try to add support relative paths in the template file by switching the directory temporarily

drupal/drupal.patch

@@ -330,7 +330,7 @@ Index: sites/all/modules/img_assist/img_assist_popup.js
 --- /dev/null	2008-05-02 21:08:21 +0200
 +++ sites/all/modules/img_assist/img_assist_popup.js	2008-05-02 21:05:56 +0200
 @@ -0,0 +1,20 @@
-+/* $Id: drupal.patch,v 1.19 2008/05/29 11:13:43 rse Exp $ */
++/* $Id: drupal.patch,v 1.20 2008/05/30 19:18:50 rse Exp $ */
 +
 +function launch_popup(nid, mw, mh) {
 +	var ox = mw;
@@ -583,26 +583,33 @@ Index: modules/user/user.admin.inc
 
 Index: sites/all/modules/xmlcontent/xmlcontent.module
 --- sites/all/modules/xmlcontent/xmlcontent.module.orig	2007-03-14 22:59:59 +0100
-+++ sites/all/modules/xmlcontent/xmlcontent.module	2008-05-29 13:11:51 +0200
-@@ -39,7 +39,16 @@
++++ sites/all/modules/xmlcontent/xmlcontent.module	2008-05-30 21:13:16 +0200
+@@ -39,8 +39,22 @@
        return t('Allows users to post XML node content and get it transformed through a configured XSLT script');
  
      case 'process':
 -      $xslt_path = drupal_get_path('module', 'xmlcontent'). '/' . variable_get("xmlcontent_xslt_path_$format", '');
+-      return _xmlcontent_transform($text, $xslt_path);
 +      $tpl_path = variable_get("xmlcontent_tpl_path_$format", '');
 +      if ($tpl_path) {
 +          if (substr($tpl_path, 0, 1) != "/")
 +              $tpl_path = drupal_get_path('module', 'xmlcontent') . '/' . $tpl_path;
 +          $tpl = file_get_contents($tpl_path);
 +          $text = preg_replace("/&template_body;/", $text, $tpl);
++          $cwd = getcwd();
++          chdir(preg_replace("/\\/[^\\/]+\$/", "", $tpl_path));
 +      }
 +      $xslt_path = variable_get("xmlcontent_xslt_path_$format", '');
 +      if (substr($xslt_path, 0, 1) != "/")
 +          $xslt_path = drupal_get_path('module', 'xmlcontent') . '/' . $xslt_path;
-       return _xmlcontent_transform($text, $xslt_path);
++      $result = _xmlcontent_transform($text, $xslt_path);
++      if ($tpl_path)
++          chdir($cwd);
++      return $result;
  
      case 'settings':
-@@ -72,7 +81,7 @@
+       return _xmlcontent_filter_settings($format);
+@@ -72,7 +86,7 @@
        }
        // Does the input format of this node use XML Content filter?
        $format = filter_resolve_format($node->format);
@@ -611,7 +618,7 @@ Index: sites/all/modules/xmlcontent/xmlcontent.module
        if ($module != 'xmlcontent') {
          return;
        }
-@@ -83,7 +92,10 @@
+@@ -83,7 +97,10 @@
          return;
        }      
        
@@ -623,7 +630,7 @@ Index: sites/all/modules/xmlcontent/xmlcontent.module
        if (!is_file($schema_path) && ($validation == 'xsd' or $validation == 'rng')) {
          $schema_path = null;
          watchdog( 'xmlcontent', t('Validation required but no schema file'), WATCHDOG_WARNING );
-@@ -93,7 +105,16 @@
+@@ -93,7 +110,23 @@
        libxml_clear_errors();
        libxml_use_internal_errors(true);
  
@@ -635,13 +642,20 @@ Index: sites/all/modules/xmlcontent/xmlcontent.module
 +              $tpl_path = drupal_get_path('module', 'xmlcontent') . '/' . $tpl_path;
 +          $tpl = file_get_contents($tpl_path);
 +          $text = preg_replace("/&template_body;/", $text, $tpl);
++          $cwd = getcwd();
++          chdir(preg_replace("/\\/[^\\/]+\$/", "", $tpl_path));
 +      }
 +
-+      if (!_xmlcontent_validate($text, $validation, $schema_path)) {
++      $result = _xmlcontent_validate($text, $validation, $schema_path);
++
++      if ($tpl_path)
++          chdir($cwd);
++
++      if (!$result) {
          form_set_error('body', t('XML Content: Invalid XML') . libxml_errors_string());
        }
        
-@@ -156,6 +177,13 @@
+@@ -156,6 +189,13 @@
      '#collapsible' => TRUE,
      '#collapsed' => FALSE,
    );
@@ -655,7 +669,7 @@ Index: sites/all/modules/xmlcontent/xmlcontent.module
    $form['xmlcontent']["xmlcontent_xslt_path_$format"] = array(
      '#type'    => 'textfield',
      '#title'   => t('XSLT Script File Path'),
-@@ -218,6 +246,8 @@
+@@ -218,6 +258,8 @@
    
    // Load the XML document
    $dom = new DomDocument('1.0', 'UTF-8');
@@ -664,7 +678,7 @@ Index: sites/all/modules/xmlcontent/xmlcontent.module
    $valid = $dom->loadXML($xml);
    if (!$valid) {
      watchdog('xmlcontent', "Invalid XML Content", WATCHDOG_WARNING);
-@@ -227,6 +257,8 @@
+@@ -227,6 +269,8 @@
    // Load the XSLT script
    // TODO: is there a way to cache it, or not necessary
    $xsl = new DomDocument('1.0', 'UTF-8');
@@ -673,7 +687,7 @@ Index: sites/all/modules/xmlcontent/xmlcontent.module
    $xsl->load($path_to_xslt);   
  
    // Create the XSLT processor
-@@ -242,10 +274,8 @@
+@@ -242,10 +286,8 @@
    }
  
    // Transform