hello, ive got a xbox that is modded with evo x. its got about 30 games and 10 movies on it. i want to get rid of some of them but i dont know how. its got a system management tool on it thats a blue screen with YOUR FILES and WEATHER on it. ive clicked delete but they wont go, i really need to free some space on it but im at my wits end..... please could someone help??