I'm having to convert a movie from .MOV to some format that works nicely on even Window Media Player 9. I tried what I think is the best -- mpeg4 -- but WMP9 wouldn't play it. Then I tried making an AVI but the quality was really bad for the file size. My boss has used "mpg3" successfully in the past, but I don't see that as an export option in Quicktime Pro. Any advice on how to get good quality movies out of QT Pro that are highly compatible with slightly older MS computers?