What brand did you get? I used to do them all the time, but I got tired of the cheap ones that we were using that would quit working, and some were DOA out of the box! I did the one in my own car, but it's a very expensive security system, with remote starter built in. If nobody else chimes in, I'm willing to tackle it, as long as you realize that you'll need a few other things, such as a transponder bypass module, and a spare key for that. You may be looking at $200 more for the stuff you'll need.