i had a buddy of mine install the pioneer 64000cd in dash in my truck. now everything works, except he cant get a picture when trying to play a DVD (have a dvd player hooked up seperate.) anyone now what the problem might be. i know the are made not to work unless the car is in park, but we still cant get a picture even in park. also, when we remedy this problem, how do you go about rigging it so that you can watch a movie while driving? thanks alot for the help