I dont use my navigation that much, but out of curiousity, if I got the pioneer 6 dvd changer, would the map disc work out of that??? If not, it aint a big a deal, I just hate the idea of having to put the map disc into the headunit everytime I wanna use it....I know if I had a cd/dvd changer, I could leave the navigation disc in the headunit at all times, but then I would have to have the cd/dvd changer mounted somewhere that would be accessible from the driver seat...any comments/ideas welcome!!!