well I dont know how well this would work. There can be some issues that would clash with the hack but here is the code anyway:
Edit newreply.php find:
PHP Code:
// redirect
if ($visible) {
Before that add:
PHP Code:
if (strpos(strtolower($message),"word"))
{
$DB_site->query("UPDATE thread SET forumid=X WHERE threadid=$threadid");
}
(Replace X with your new forumid)
I strongly suggest this to be used in a test board first! I havent tested it and it could have unwanted effects..