okay, before i say anything, i am not supporting criminal activiity in any way shape or form (:
ImgBurn can burn xbox360 games to double layer DVD+R. layerbreak needs to be custom defined to "1913760", and i would recomend not burning any quicker than 2.4x. It on the other hand cannot back them up to your harddrive on your computer. To learn how to back them up to your computer, im sure there are places that you can learn from. Hope this helped somehow
ciao