Burning Xbox Games...

[Kellski2]

I was able to make copys of Dvds and play them in every dvd player in my house even my xbox with this software but I tried burning a backup copy of one of my games when I bring it over to a friends house so it wont get scratched and it didn't work. Why is that? They say you need a mod chip but I was successfully able to make backup copys of my dvd's and they played on my xbox just fine. Why not a backup copy of my xbox game? A reply would be greatly appreciated.