I have been trying to "back-up" acouple of dvds, but on the dvd files are in ISO format ( like every dvd i think? ) when i back it up using dvd shrink it works fine, but when i burn it into a disk using nero it burns them as ISO, i would have faught it'd be burning them as MPEG4? becouses there in ISO format the dvd will not play, it doesnt play on my pc, 360 or dvd player? can somebody help me or link me to a tutorial? any help would be much appreciated!