Okay, brilliant, it works! I've just got to fix some little things, and then I'll have a UPnP dll to contribute for you all to use. EDIT3: The dll is now available in the User Resources forum.

Jibb

EDIT: New version at the same link, uses the new DLL. Please re-download. SHOULD be no problems, but I never like to assume too much with programming, so I'm hanging around if anyone wants to join. Once this version has been tested I'll put up the dll so that no one has any excuses for requiring their players to set up port-forwarding manually.

EDIT2: @Redeemer: I was AFK when you joined, but thanks for testing it out!