I've asked this before, cant remember where...
If I could tap into the factory cameras ( already five, I would add two more to show the side along the doors ) then I can plumb them into a analogue to IP encoder, then store it all on a solid state HD NAS. Anyone have any info on the factory cameras? I wonder if they are analogue or digital. Does the factory screen take an analogue input - like an external DVD? If so then its likely that the cameras will input to the screen in analogue.