--- itweak_upload.module.orig	2011-08-28 01:04:21.000000000 -0400
+++ itweak_upload.module	2011-08-28 01:07:32.000000000 -0400
@@ -882,6 +882,11 @@
       $options = isset($file->preview_options) ? $file->preview_options : array();
       if (!$file->access || !(isset($file->preview) || _itweak_upload_isimage($file) || isset($options['custom']))) 
         $options = array();
+
+      $data = compact('file', 'text', 'href', 'options');
+      drupal_alter('itweak_uploads_prerender', $data);
+      extract($data);
+
       $row[] = array(
         'data' => l($text, $href, $options),
         'class' => 'file',