Have you tried VLC: http://www.videolan.org/ (at 1st I thought you were talking about a game.) What type of burner app do you have? Perhaps if it's a good quality one, you can add it & attempt to preview it or burn it to a cd-rw & try it out. VLC comes with its own codecs built in so it's fairly reliable (not the best interface & controls but it plays most things!) As far as codecs go there's also: http://www.free-codecs.com/