Help using WMP to burn a DVD Video

I'm trying to burn a dvd using the windows media player that comes with vista ultimate. I have an Intel 82845G graphics card/controller/whatever and it says my video card is not supported. I've installed the latest drivers, and I have the latest directx9, but it still says that. If my video card is just not big enough, is there any way to do a registry hack or anything to get around this? If not, can anyone reccomend a freeware dvd burning tool that works in Vista? It would be greatly appreciated. I'm trying to burn .AVI files, by the way.