I found sometime ago the Following on this site. I can't remember where but here it is :Trucs pour CrossfireThis is straight from the Crossfire manuals supplied to the dealership, or if you are a Chrysler tech, I got it from Tech Connect.

STANDARD PROCEDURE - TRANSMITTER PROGRAMMING

The Remote Keyless Entry Transmitter(s) can be programmed by the customer without special tools.
PROGRAMMING PROCEDURE

Transmitter programming by the customer is done by performing the following steps:

1. Insert the key into the ignition switch.
2. Press either the lock or unlock button momentarily twice.

Turn the key in the ignition switch to the ON/RUN position within 30 seconds.

Hope this is useful and saves you $100 or more.