Bought this for the car parked outside. Programming was piece of cake, just read the directions in the pamphlet or on the garage opening motor [which I did].
1. Press and HOLD the open button on the remote
2. Press and RELEASE the purple button [I forgot what they called it]
3. Release the remote button ONCE the garage openers' LIGHT comes on.
Make sure you reprogram the old remotes at the same time so they all work on the same code, frequency, or what-not.
Excellent seller as well, brought it from "ASPDOORS & A WHOLE LOT MORE"
Hope this helped.