lol Hate to make ya lose much sleep on us... but then again, I do, too. 
The quickest way to do this will be a script that queries the node table for any node ending in _0 and then deletes those nodes by nid:
<?php
$result = db_query("SELECT nid FROM {node} WHERE name LIKE '%_0'");
while ($data = db_fetch_array($result)) {
node_delete($data['nid']);
}
?>Backup your data before running that! You can try pasting that into a Drupal page w/ the PHP filter. Also, if you have phpMyAdmin, I'd recommend just running that query (remove the { }) in the SQL tab to see what nodes it pulls up. If those aren't the ones you want to delete, don't run this code.
Joined: 08/07/2007