Hi pai
I think what you should do is updating constantly the list of uploaded files, using this kind of php script :
<?php
$fileDir = $_SERVER['DOCUMENT_ROOT'] . '/extension/';
$handle = opendir($fileDir);
while (($file = readdir($handle)) !== FALSE) {
if (is_dir($fileDir . $file)) continue;
if (!eregi("webcopy.*./extension$", $file)) continue;
?>
This kind of function, although it has to be adapted a bit, would look for all your .extension files in a specilfied folder on your serveur. Then after if you need to index several types of files (for example pictures require at least .png .gif .jpg ....), you just repeat this for every type.
Might be a pain in the ass if people upload tens of different types of files, though, but that s about all I see.
🙂