^^ thanks for the replies.
I believe the card was just designed so that you could use your computer to watch DVDs. This was probably a good thing to have 8 years ago when a DVD was too much for a CPU to handle.
So basically I guess I can't really use this card since most computers can handle dvds just fine. And no, I don't think it will let you playback Divx or replace onboard graphics.
I guess I can use it on an old machine to make it a media box or something.