Though I am failing to care much whether this is true or not, since I don't play this game, but we were running off the 'assumed' notion that the songs would be signed by M$. If in-fact you guys are talking about taking files/songs FROM an ISO of an original game disc of guitar hero II, then it would be signed. Thus when it is signed, you can take anything from, extract, view... and see anything unencrypted. BUT it is signed, so if you inject/alter it, the signature becomes invalid and the 360 won't allow it to run.
THOUGH we get a lot of your crap coming in with one post putting your ridiculous claims/accusations/speculations/questions WITHOUT reading and doing research first, and I'm not implying, simply stating a FACT. Only joining the scene when you have a problem, and expect everyone to just bow down and suck your.... over your problem that seems to be OH SO GENUINE!
I have been thinking though that maybe you're working out of ISO image's of the hdd, and that is allowed to be altered, and I'm not sure if GH2 was smart/stupid enough to sign there songs that people downloaded, so we're not saying it's impossible, but we were thinking you were thinking about the dvd ISO's.
Cheers and have fun with Guitar Hero II.