ok my sister has a gamertag and we bolth play the same game NFS prosreet and im wanting to race online and sh*t along with my of our games but my account on the xbox is not online and i cant get on hers to play becouse she has one on nfs so how can i make my account online i asked ppl at gamestop they said u can do it and i tryed the way the explained me but couldnt find how to do it thanks and if any of yall have it we should play