What do I need to play Xbox games online through GameSpy Arcade?
First, you’ll need to download and install the GameSpy Tunnel program, whichy creates a special lobby in Arcade just for Xbox games. To download it, please visit: http://www.gamespyarcade.com/support/tunnel_xbox.shtml. This page will also give you instructions on successfully configuring the software. To confirm your network setup, please visit http://www.gamespy.com/articles/november01/arcadexbox/. Both pages include explanations and pictures to help you work out your networking possibilities.