i had my perfect dark zero extra dvd that came with the special edition and i tried to burn it using nero express. so when i finished burning it and put it in my xbox 360 it started up with the swirls. then i gave me a message that said to put the disc in a xbox 360. i think it was the same as the one that you get when you put a 360 game in a orignal xbox. so that was kind of weird. does anyone know why that happens?