Check out www.avelectronic.com. They sell a conversion kit that will allow you to play DVD's on your navi screen. You will need a separate DVD player with a power inverter, and this kit itself which itself costs $500 in order to use your Navi screen. A blitzsafe adapter ($70)will allow sound to come through the factory system. Thats the only way to use the stock navi screen for DVD's, but the stock Navi DVD Rom wont play DVD movies, so you need a separate source.