Before I even say anything I just want to note that I have looked around extensively for the anwser to this question for many days. Just today I have sat here from 10PM looking for anwsers, it is now 4:30AM, and while I did find a lot of usefull information by using the search future and search engines still no anwsers to the real questions. I'm sure if I look long and hard enough I can find the anwser, but I have work and other things to do and do not have the time to sit here for hours upon hours every day. I would seriously appreciate any help that I can get from any of you guys. Even if you can't anwser my question, can you at least point me in the right direction as to where I could find it? I need to know, why do you need to use a modchip to play backups of xbox games? Everything I read says, just because.. or something else along those lines. I'm thinking can xbox detect writeable media and just choose not to play the game which is on it? If so, how does it detect whether the media is writeable or pressed? I have read something which suggested that PS2 looks for bad sectors on the cd? Is this the case fox Xbox as well? If so, I dont understand why this is an issue. Can't a burner just burn a bad sectors? If not, why? If you're going to tell me that it automatically corrects them, thats all well good, but hardware should do what it is told to do by software. Even if the auto-correction feature is written in BIOS, since the BIOS can be upgraded can't you just get a version of the BIOS that doesn't have this feature?