After clipping 16 hours of video, my office updated from CS3 to CS4. When I open the projects in CS4, the clippings of the video are still the same size but many of the videos have either been replaced by a new source or the clipping is not synced to the original spot. When I opened the video on my buddy's CS3 version, it worked perfectly. Downgrading back to CS3 unfortunately is not an option. Is there anyway to fix this mess?