Try this free download at Download.com - http://www.download.com/AVI-Codec-Pa...ml?tag=lst-0-3
It's an AVI Codec Pac and it should have what you need to run all major video formats. This should allow you to watch the video in whatever format it is. I used this with my DivX, and it runs practically anything.
Question answered, so thread is closed. If you have any more questions, PM me.