I have seen all of threads for the aux input to the nav system, but does anyone know if it possible to get an output from the video. I was hoping to split off the display from it to put in headrest screens. It would be nice to just use the nav as the brains of everything and just monitor it form the back seats. Then there is no extra dvd player or anything required.(another plus: people in back get to see where you are when using the map disk).