I do not have XBox live service (long story). However, one of my best friends does. Would I be able to take my XBox and my copy of Splinter Cell over to his house, connect to XBox live, and download the new level? In other words, do you need to purchase seperate XBox live accounts if you own multiple XBox's? I would assume so, but thought I would ask. I can't try it because I'm thousands of miles away right now and won't be back home for a few more weeks. Thanks!