I purchased my Journey last Thursday and asked to have a DVD screen put in so I could use the 6 disk DVD changer on long road trips for my kids. Well my wife took it in Friday to have it installed. When she got home I was surprised that what they had put in was a self contained DVD player with it's own screen. I was pretty upset and called asking why it wasn't hooked to my radio unit. I was told that the stock screen that comes from the factory has a decoder built into it that decodes a signal f