Easiest option is to just put your comp in the Demilitarized zone (NAT DMZ) Look for that and enter your computer's internal IP address (Something like 192.168.1.x) into the box. That will open out all the ports and torrents should work fine. The disadvantage is that you're opening out ports for everyone to see, even viruses and worms but if you're intelligent enough, you'll have UAC enabled on Vista or 7 and have a decent antivirus installed so it shouldn't be a problem. If you're on XP or Linux, you'll at least have the latter with the firewall enabled.