get a router, check ur local tesco! (yeh ok i know what ur all thining) but there doing wireless routers atm about £30 and itll be plug an play. Or check ebay for a cheap router can pick wired modem/routers up for around £15 on there if u look hard enough.
Other thing u can do is make ur naughty xp version appear legal instuctions for this can be found on most p2p sharing programs.
OR finally (i say finally cos this one will mean the 40 odd quid u spent on xbox live a waste of money) continue using ur cross over via pc and download a small program called xbconnect (its a free version of xbox live, cpet less people use it so less people 2 pwn but it does allow copied games and chipped xbox's to connect to it.
Other thing u can do is make ur naughty xp version appear legal instuctions for this can be found on most p2p sharing programs.
OR finally (i say finally cos this one will mean the 40 odd quid u spent on xbox live a waste of money) continue using ur cross over via pc and download a small program called xbconnect (its a free version of xbox live, cpet less people use it so less people 2 pwn but it does allow copied games and chipped xbox's to connect to it.