Can this be done and does it require a "hack"?Where can I get this?

The factory equipment can not play movies by itself. You can however get a DVD player or just about any standard video output to work on the nav screen with some sort of interface device. I am using a navbox to output a modded xbox onto the screen. You would also need a way to get the audio to the stereo(RF modulator or a PAC-NIS). I'm not sure what devices to use to feed video from a device other than the xbox, but I know it can be done.