Thanks for the replies. I was starting to get the impression that learning was the way to go and you confirmed it. Frankly, I'm shocked that in this information-rich world that nobody has a website with all gear by model # and corresponding codes. Do I smell a business opportunity? Since this remote is not for me, getting access to all of the remotes it replaces is not trivial. At least she's in the same state. But what if she were across country?? "Trial and error" and "learning" would not be options!