Make sure that what you're proposing is safe and legal before you start. At a minimum, you would need to have a neutral lock-out so that it could not be started in gear. Here in the UK it would be illegal since it is not legal to leave a running vehicle unattended, and if it had been legal I would have expected insurers to be extremely interested in a modification which makes it possible to start the car without a driver in it, and enables somebody without a key to start it.
I am in the US and I would assume that it is legal since you see commercials all over the place regarding On-Star starting cars remotely and getting them warmed up for you the morning (which is my purpose) as well as remote car starter kits all over american websites. But thats a good point, I'll have to take a further look into that and the insurance side.
Once you have overcome those issues, in order to get it to work you will also need to disarm whatever alarm/immobiliser your car may have installed. Not a problem if you don't have one, but most cars do these days.
My 06 doesnt have an alarm but I'm not sure about an immobiliser. How could I tell?
Any ideas on how to get wiring schematics and such for my vehicle? or information on my ECM?