1.turn your cruise control on
2.turn the ignition to 2nd position (do not start the motor)
3.push the button on your cruise control and hold it, your CEL will start blinking and after 5 secs it will start blinking rapidly, that is 2nd program (slower blink is the first program)
4.release the button at the desired program (whichever blink)
5.turn the ignition off
6.wait 10 secs
7.turn the motor, you will see your CEL blinking crazy for 3 secs, that is fine.
8.Enjoy yourself
PS: you gotta figure out which is the stock and 91 program (1st or 2nd), if you are confused, your dealer (APR) can do it for you.