Ok I just have a simple question. I've got some xbox 360 games I bought for the last couple of years. And I like to always back them up using XDVDMulleter.
Last night I bought FIFA10

And I did my normal thing, I fired up Xbox Backup Creator and made an .iso (using my trusty old Kreon drive) of my game. To my surprise after I burnt a disc using Imgburn the game won't play. So I tried burning an older game I backed up (COD4) and the game worked on my xbox 360.
So I was left scratching my head and wondering WTF!! And then I did some research and read about abgx360.
My question is how come my older backup work? And when I use XDVDMulleter the .iso (FIFA10) passes the stealth check but it still won't play in my 360?
I finally got it working after using abgx360 but I'm just curious how it all works. Can someone please enlighten me?
Thanks in advance!!!!
EDIT:
One more question. Do I have to backup all my games again? I only tried COD4 backup and maybe I was just lucky that it did work.