Index: branches/5.1.x/core/install.php
===================================================================
diff -u -N -r13312 -r13367
--- branches/5.1.x/core/install.php	(.../install.php)	(revision 13312)
+++ branches/5.1.x/core/install.php	(.../install.php)	(revision 13367)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: install.php 13312 2010-03-24 13:36:19Z alex $
+* @version	$Id: install.php 13367 2010-04-10 12:12:23Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -1181,6 +1181,30 @@
 		}
 
 		/**
+		 * Virtually place module under "modules" folder or it won't be recognized during upgrade to 5.1.0 version
+		 *
+		 * @param string $name
+		 * @param string $path
+		 * @param string $version
+		 * @return string
+		 */
+		function getModulePath($name, $path, $version)
+		{
+			if ($name == 'Core') {
+				// don't transform path for Core module
+				return $path;
+			}
+
+			$version = $this->toolkit->ConvertModuleVersion($version);
+
+			if ($version < $this->toolkit->ConvertModuleVersion('5.1.0')) {
+				return 'modules/' . $path;
+			}
+
+			return $path;
+		}
+
+		/**
 		 * Returns list of modules, that can be upgraded
 		 *
 		 */
@@ -1194,7 +1218,9 @@
 					continue;
 				}
 
+				$module_info['Path'] = $this->getModulePath($module_name, $module_info['Path'], $module_info['Version']);
 				$upgrades_file = sprintf(UPGRADES_FILE, $module_info['Path'], 'sql');
+
 				if (!file_exists($upgrades_file)) {
 					// no upgrade file
 					continue;