--- pingback.install	2009-03-05 06:33:19.000000000 +0000
+++ pingback.install	2009-03-19 17:11:44.000000000 +0000
@@ -45,6 +45,10 @@ function pingback_schema() {
  */
 function pingback_install() {
   drupal_install_schema('pingback');
+  
+  // if scheduler is installed, set pingback to run after it in cron runs
+  $weight = (int)db_result(db_query("SELECT weight FROM {system} WHERE name = 'scheduler'"));
+  db_query("UPDATE {system} SET weight = %d WHERE name = 'pingback'", $weight + 10);
 }
 
 /**