private function _getPreparedPlugins()
 {
     $prepared = array();
     $plugins = Tools_Plugins_Tools::findAvialablePlugins();
     if (!empty($plugins)) {
         foreach ($plugins as $pluginName) {
             $plugin = Tools_Plugins_Tools::findPluginByName($pluginName);
             $preview = $plugin->getPreview();
             $previewPath = str_replace($this->_helper->website->getUrl(), $this->_helper->website->getPath(), $preview);
             if (!$preview || !file_exists($previewPath)) {
                 $plugin->setPreview($this->_helper->website->getUrl() . 'system/images/noimage.png');
             }
             $prepared[] = $plugin;
         }
     }
     return $prepared;
 }