Windows Media player codec so I can use DivX files?

I have a DivX file that I want to be able to make a video out of on Windows Media player, but it won't open. I already have a codec installed so that I can use AVI files in the program, but is there one so that I can use big DivX files in the program? (the file is almost 2 GB but idk if that matters hah)

Thanks so much!