I think the most difficult part of this install would be the camera and finding a good spot to mount it. Would you replace one of your reverse sensors? The wiring install looks pretty simple and the NAV unit is one of the more simpler items to access in your car. So, the converter looks rather easy. Again, I have no idea where I would successfully mount a camera on the rear of the car without some serious mods.
Anyone have any ideas? Where did your Range Rover buddy mount his? There are probably more options on that car.