If you haven't already bought one...purchase the Engine Start Button from Ignited Performance
I have one and there are a few instructions with it that would make the job pretty easy. While my car is in the shop next week having mo shit done to it is when mine is being set-up cause I haven't had time to do it myself. If you aren't familiar with any wiring take it to a local shop, even a stereo shop could do it easily. Good luck!