Don't really have the time for a lot of custom fabrication or the money for a nice Xenarc or Lilliput touchscreen. So I just decided to make all the wiring as clean as possible.

Stuff that may not be obvious from the picture: Cables for the keyspan remote and the PSOne LCD run into the dash and invisibly down to under the front passenger seat, accessory power outlet added under the seat for DC-DC power supplies for the laptop.

Still looking for a nice Mac OS frontend that doesn't require a touchscreen... will write my own if my search is unsuccessful.