It is quite easy to do. I have a S2000 push start button installed on my Prelude. Confuses the hell out of the car mechanics when they go to start my car.
However if your not to sure which wires to hook up to any car starter installer should be able to hook it up for you.
You need the ignition and the the wire used to crank your starter, it is different on every car, so check a Helms manual for the colour codes and test them with a test light first. Plus make sure you solder the wires, don't just butt splice them, there is alot of current going through those wires and butt splices are poor conductors and will short after time.
2004 Toyota 4 Runner V8 Sport
2001 Prelude SE- Sold
Speed Kills...Drive a Ford...Live Forever!!!