That is SLICK! I have been wanting to do something like this in my car for a while now. Can you give a few more details on the interface and relay system you used?
I took inspiration from your image, and started to work on a screen for my car as well. If you are interested in the PSD just drop me a PM.
Here is what I have so far: (It was a PAIN as I could not find any door lock icons, windows icons ect, and had to create them from scratch.
One great advantage of this layout, is the pressable button area for the hood, doors and trunk, extends into the image, so touching a door, or the hood ect, will open it. In my case however, I cant open my dorrs or hood with the push of a button
EDIT: Woah! I just read your page! I used to own a Fiero, and loved that car! I always wanted to mod it with the Ferrari body kit! I never did....but say one that you could hardly tell it was not a Ferrari, until you actually oipened the door and saw the console and dash. about a week ago I saw a 88 Fiero for sale on the corner, and called the number, and he had JUST sold it, and didnt even have time to go get the car off the corner! Rats! Day late and a dollar short as usual. I would love to see some pictures of your modifications.
Here are a couple pics I snapped of the one I saw that was modded: