I use Nero 5.0 w/a Cendyne Lightning 2. I have burned ISOs maybe, 20 times. My friend passed me the ISOs of all three Quake games and asked me to burn him some backups. Here comes the problem. When I FILE>BURN IMAGE>QUAKE3.ISO it says the header is wrong. After toying around with the header size and burning in all possible combinations, when the cd is done burning, windows says the cd is in an unknown format! nero is the only program i know of that supports my RW drive. Please help!