Just finished the back up camera install which works perfectly, and the thought occurred that perhaps I can hook up the portable dvd player to the input and be able to watch the movie on both. A quick temporary test showed it works just fine. Now I am going to buy a RCA splitter and install a switch to turn the rear view camera on/off in parallel to the reverse switch so I can use the camera going down the road to check for clearance on lane changes. Then I will figure out if I should mount the dvd player, or just let is sit on the floor behind the passenger seat and use the remote for it. More to come...