Hi guys. I wanted to back up my Monty Python-Holy Grail disc. I have tried to get disc-1 to play in my HP DVD burner but it doesn't see it. Disc-2 plays fine(documentery & interviews). When I inserted disc-1, it said "this disc is in a format XP doesn't recognize" or something like that. It also just sat there and blinked. I rebooted and tried reinserting the disc. What did they do to this disc? What format could it be in? It says NTSC on the front. Any ideas or has anybody seen this happen before? It's a first for me. Thanks!