I made a home movie years ago on my Dell PC using Pinnacle Studio. I just tried playing the DVD on my MacBook Pro and it won't run. I got a message about needed a component to play Mpeg2 movies. When looking at the disc, I see the movie is made up of a number of files (e.g., VOB). I'm sure one of the files has the commands for running all the parts. I mention this because this home movie is not just a single mpeg2 file. Will that $20 component for playing mpeg2s be all that I need to watch this movie on my mac? Also, I have not upgraded to Mountain Lion yet. I could do this now if this needed component is already a part of Mountain Lion. Thanks.