You might be able to get some help here
http://www.portforward.com/guides.htm
But the way I set mine up was I assigned my ps3 an IP address on the pc first, and set that one up on DMZ. DMZ is basically placing that IP address outside the firewall if I understand correctly. That way you won't have connection issues playing Multiplayer games.
I am not too familiar with that router, so I would have to look up how to do it. If I come across anything I will post it here.
To get the IP address, on the pc go to start/run/cmd and type in IPconfig
It will then give you a bunch of numbers and all of that. Also to go into the router settings, pull up a IE window and type in 192.168.1.1 or 0.1. Might be different for the router you have, but that's what I need to look up.