I successfully burned a one and a half hour movie after choosing DVDArchitect/Pal video stream and AC-3 Audio. after playing back, I noticed something I didn't like and went back to Vegas, (4.0c), to make some minor alterations. I tried burning again, but after 8 hours and 99 percent completion, the process refused to go any further, even after leaving it for another five hours. The "cancel" process, although it had acknowledged that I had cancelled, didn't want to work either, so I had to do a Cntl/Alt/Del. I was using two drives for the whole process, so I defragged both drives and tried again with exactly the same result. Anyone got a clue? Thanks.