[deboy69]

The way that I have gotten xbox live to work is to bridge the connections. As I stated I use Vista Ultimate 64bit but it should be the same for all of the Vistas. Plug your xbox into the ethernet port on your laptop/pc.Highlight your connection either the wireless/ICS phone (depending if youre using Wifirouter or ICS via USB) and ethernet. Right click on it and click on bridge. Should work. If not try turning off you xbox and turning it back on. Disable/enable the ethernet for a fresh start. And walla should work. Make sure you xbox setting are set to automatic for IP and DNS.

You can just use the phone by itself. However you need to use WMwifirouter on your phone and a wireless adapter on your xbox. Make sure your phone is plugged into the wall for it to charge. The battery will slowly drain even though it is plugged into the wall but it isnt very fast.