Find link no. 1.7 here http://utorrent.com/faq.php But I'm not recommending heavy duty cracking of a device's firmware.

Manual port forwarding is generally the way to go with that model. Unless the newest firmware out has fixed its problems. UPnP for this model in the past has apparently been poor AFAIK. Connection problems? Check here first! (click on link) & you'll find links to that model or for manual port forwarding find it at portforward.com