Program to convert video files for xbox 360?

Does anyone know a good program for coverting video files so I can put them on my xbox 360 hard drive? Help appreciated. Thanks.

http://www.videora.com/en-us/Converter/Xbox360/

I've actually only ever used it once (which turned out good), but their iPod converter works pretty well for everything I've thrown at it thus far. Don't know that you can put them on your HDD though. It's designed to be used with Media Center and/or Media Connect.

i dont think u can you even store these files on your hd..

maybe with the x sata?????