Quote Originally Posted by speedminded
One of the problems you'll run into is using a desktop computer harddrive, they don't really think too kindly of being abused...bumps, temperature changes, etc...Probably be best to find a parts laptop with a trashed LCD and work from there.

You would need a video-out on the graphics card (composite, s, or whatever the screen has inputs for). As for power you might as well hardwire it into an inverter...using relays, fuses, etc. You don't want to have wires/cables running all around inside your car...having to worry about accidently bumping and unplugging something, etc.

For sound you could easily wire it up to a pair of tweeters on the pillars or doors but wouldn't you just want to run it through the stereo so you can play MP3's and movies on the "carputer"...just a simple FM modulator would do the trick.
I used a desktop harddrive (80gig western digital) for 1 1/2 years and it held up fine on my everyday car. Just mount the drive side ways, which should keep the disks from getting scratched. I really recommend he Epia M1000 it's not that expensive, takes up little space, and takes little power which are all things you want to look at when making a car computer. It has both s video out and composite out, and a 5.1 surround sound all on board.