I am trying to setup a DVR system in the car. Has any one had any experience with the different types of cameras, and has any one ever done any mobile DVR systems?

I figure I can probably get a shuttle computer and put a 4 plug DVR card in it with a hotswap storage drive. But I dont know how well this works.

I also dont know what cameras will be a good match for what I want.

Any one have any experience in this?