to add a reverse camera, it is quite simple. all you need to do is buy the "Eclipse" (brand) 104 camera (from memory) and plug it into the back of the unit. it is a straight plug and play. it retailed for about $350 a few years back so it might be a little cheaper now. as for the playing DVDs, havent played around with it so cant help you there. so all the best. cheers the bob