guys i have mac os 10.3.9 and my mpg files doesn't work in dvd studio pro. It says that incompatible file (or something like that). My video files are mpeg2 files. How can it be incompatible. I mean they are dvd files but it doesn't work in dvd studio pro 4. In quicktime i can watch them but no sound. Even with other programs, no sound. I just started to love mac but i couldn't solve this problem for how many days. To tell the truth i am getting cold.