get the new firmware and you dont need to burn to dual layer, but you can just open it with xbox backup creator and pop in a DL dvd and it will let you select the type as either auto, 360, or original xbox
i have the 78 drive in my 360 and and i dont think that supports single Layer, but if i open the iso in XBC, it will burn it to a dual layer properly??
the program that i name converts single layer iso's to dual-layer, and dual layer to single layer, and also does som other thing that i havnt checked out yet. so if thats what you need then get it. it will also create the correct .dvd file for the new iso.
it did not worked for me cause it want that i put a xbe thing i dont know what it is then it want the ss bin file dont know where to get it and then the dmi file and pfi file, and i tried without those and it dont want to merge the iso file, it allways say error, its weird i have a iso file from xboxrip.com i think and is PAL and i have the backwardscompat i really need help here dude, if you made it tell me how i can make it too, i will apreciate, i allready loose a dvd + r dl cause of this, i know that the iso is a dvd 5 but i want it on a dvd 9 well. if anyone see this help me thanks