Yer, well you can at clarence docks anyways, requires a little bit of fiddling though. The network registers your computers MAC address, so when you try to connect your xbox to live its using a MAC address seperate from your computer and it won't let you on the network, all you've got to do is get your computers MAC address and in the advanced console settings bit on the xbox put your computers MAC address for the console, that will let you on, lets me on anyways. Google it and search on the xbox forums, theres some guides on there which show you how.