I have a few basic questions regarding my Xbox360: I purchased a new Xbox360 and it had stock firmware. Suppose stock firmware = A Now, in order to play burned games, I flashed it. Let it's new firmware be B The firmware B could not play XGD3 games so I downloaded Microsoft Update from it's official website and updated my Xbox via flash USB. But after the update, I find that my firmware has been reset to A (i.e. Stock firmware) Here are my questions: 1. Why did this happen? 2. Is it possible to update my Xbox360 WITHOUT getting it reset to stock firmware? I want to update my Xbox but it's getting reset to stock firmware caused by the update 3. What should I do if I want to play XGD3 games?