There is a massive 2 week suspensions going around on xbox live and it is going on because if u have been in any kind of modded lobby they are going to give you a two week suspension from xbox live.i just notice it because all over xbl and on the Internet,so just be carefull, its something going on around xbox live,it could be a permanent ban too,just watch out.ive only been doing Gta 4 iso mods for a couple months in private match with my buddy's so I think they figured a way to detect your iso mod.