clifford rs3 and rsx3.5 remote?

i have the rsx 3.5 in my car andmy brother has the clifford rs3 alarm in his car with the stock remote that is beige and big with lock, unlock, panic, and the aux button. i recently acquired an extra rsx3.5 type remote with the carbon fiber look body that has the lock, unlock, *, and trunk button. how can i program the new remote with my brothers rs3 alarm and add his old remote as an extra for the rsx3.5 alarm and maintain the same configurations as the rsx3.5

go to remote learning, select option 8, auto learn and let'er fly...otherwise you have to program each button/function individually....Kevin Gerry

Certified Electronics Technician

MECP First Class Installer

Owner/Installer

Classic Car Audio

since 1979