1999 dodge intrepid programming additional remotes

hi everyone, my dad has a 1999 dodge intrepid with a factory alarm with lock unlock panic and trunk. i went on ebay and bought him another remote for his alarm so that my mom had a remote as well. when i purchased the remote, i made sure that all the numbers on the back of the remote match his remote. how do i go about programming the additional remote so that my mom and dad both have a remote for the car alarm. i would appreciate if someone can give me a hand. thank you. -rikki-

Thats all done at the Ford dealership.