So I got the 4GB in June and since then have been having issues with MW2 and Mercenaries 2: World in Flames. I bought MW2 in June pre-owned and also got Mercenaries 2 from my friend for my birthday. MW2 works perfectly on maps Afghan, Rust, Highrise, Wasteland and Quarry. The rest is a no go. They play for a couple of seconds and then say disc is unreadable when disc is in perfect condition. Mercenaries 2 just freezes instantly. I asked Yahoo answers and they said to get a hard drive and install my friends MW2 on my Xbox. What should I do? Is it my Xbox or my games?