Tonyride,
I don't know if you received an answer, but here's how you do it:
stand near the driver's door, make sure you have both remotes with you. Take one remote, point it at the driver's door handle and hold down the lock AND unlock buttons simultaneously. You'll see the door either lock or unlock, dpending on whether it was locked or not at the time. If you keep an eye at the top of the key fob, directly under the panic button, you'll see a very small red LED blink on and off one time. Keep holding the buttons down until you see the LED blink twice. That's it. Do likewise with the other remote. You can always change it back and forth using the same method.
