Hi Nat,
Thank you for your very detailed response. From what you are telling me, it seems VP is not the correct tool to edit MPEG-4 video unless you want to make a big AVI file which is 5 to 10 times the size. I am wondering if the poor audio synch after trimming problem is arising because you are not cutting on keyframes? I think other software can cut on keyframes to keep everything synched. Does anyone know of software that will trim MPEG-4 without re-encoding?