You can find a local tuner guru, pay gm to unlock your vin, and turn the programing for the anti-theft off.
Or, Cut the head of the key off, glue in to the inside off the plastic pieces around the steering column close to the ignition switch.
On the wiring, you can find a local salvage yard, find the plugs and connectors you need to make patch cords, so you don't have to butcher your factory harness. You could also just run an extra wire to the starter prong, KEEP IN MIND, THIS IS A STICK AND YOU WILL NEED SOME WAY OF KNOWING ITS NOT IN GEAR. Not sure the transmission has a neutral safety switch, I though it was on the clutch pedal. I might be wrong about it not having a neutral safety switch though, seems I had a manual with factory remote start. It had the remote anyways with the start button. Never tried it.