Existing Users: Because of an update to the forum software you will need to reset your password. Please use the "Forgot?" link on the sign in form to do so. If that doesn't work, send me an email at email@example.com and I'll sort you out!
Since you didn't reply to my email, I'll post it here :spank: http://www.teamxlink.co.uk/
Sign up for free, download the software, run this software on your PC.
Then, connect your Xbox through said PC (or router), to play system link online.
I will own you at Halo 2 and PGR2 :D
BTW: What kind of connection do you have? (speed)