Controling a 12 V Throttle body servo motor

jeffmorris:
k3nshin, Please don't do anything to your car's electronic throttle. If you make a mistake and you have an accident that hurts or kills someone, you will be in a big trouble.

I have a spare accelerator pedal and throttle body to test, so extensive testing will be done first before trying it on my car. I am converting to a standalone ECU and i have to find a solution for this... from a short search, i found another 2-3 threads in the forum regarding the exact same subject, but no information that would help unortunately.
This is what i am looking into :