To tweek the audio or video. Cause when i convert a movie sometimes the audio is ahead of the video so you hear gunshots and like two seconds later you see the guy start shooting. Does anyone know a way to fix this? Thanx in advance for all your help.

I had the same problem with some dvd creations and used MPEG Video wizard DVD and its quite simple.
I am sure there are some other versions of it that cover other formats as well. Find their website through google and check it out.