Really struggling to find information about this around the net. All seems very secretive to me. My xbox has been struggling to play disks for a while but after many attempts it usually gets going. I bought Dirt3 today and it wont even start just keeps saying unrecognised disk. I have a July 2007 Arcade machine(UK). I've contacted microsoft but not heard anything. Sucks so much, just wanna play Dirt :(