open the file even though it says the right compressor can't be found. If it says that the format is IV5 or IV32 or something, do a search on that with google and download a codec. If it says something else is the format, go to 3ivx.com and download the 3ivx codec, and then go to download divx doctor II which converts avi to mov (you need this if you want sound on your movie)here