Well, this thread only covers the actual LCD screen and touch kit. This screen is a direct replacement for the OEM dash part where the dash vents in the center are.
The dash comes appart in two places. The small silver strip that stars at the passenger door above the glove box and extends just past the radio. This pulls out exposing a set of screws where the radio and dash are. Unscrew the screws. Slide the radio out and pull up the factory dash/vent part. Remove the factory radio harness from the radio plugging it into the wiring of the screen. Plug the other end of the wiring into the radio. Replace the screws and your screen is installed. The wiring is the simple part because its plug-and-play in terms of proper wiring.
To use it you'll need either a video card that supports a RCA type jack OR get a VGA to RCA adapter.
If you want to add a touch kit its a bit more involved as you need to take appart the screen and install the kit. Nothing too complicated but it takes someone with patients because you need to remember how you took it appart.
As for "what GPS or computer setup should I get", thats something you'll needed to decide for yourself by reading the reviews in the forum.
I went with an Voom 2 case and mounted it under the passenger seat. I then ran a 8 AWG wire from the battery to the passenger seat. I ran the remote wire from the radio harness to the seat along with a RCA cable for video and a single USB cable. I placed a small USB hub in a pocket in the dash to connect a GPS and the touch screen to. Its all very clean but I didn't take alot of pictures because it was a play as I go type thing.
Its very easy to get all the wires run by tucking them up under the center console.
Hope this helps