1st Don't play games that have not been officially released in stores ! After official release of the game wait about for 2 weeks and you can play. If you'll ignore this step you'll be banned fro, LIVE in less than 24 hours

2nd After you burned a game on your DVD, You must SP it. (Stealth Patch). By doing that LIVE wont be able to tell the difference from original copy of the game and the modded one. If you'll ignored this step, you IP adress already must be in the list of BAN WAVE ! (what is ban wave ? go http://soviets.at.ua/forum/4-19-1 ) .

3rd How to stealth patch it and what do you need for that ? You need a program called abgx 360. Go on youtube and they'll show you how to use it.