(Rock Band 3) Constant Motion 100% FC

my gamertag is SeparateDoor686 because i'm on a modded 360 and there's no way in hell im logging onto my main account on a modded Xbox Wanted to do this on RB2 originally but when I got on any time the game would load DLC it would crash, so i said fuck it and moved over to RB3 where i got it first try