i know this thread is a year old but hoping this help others, let me give my 50cent. I first used girder 5.1 with pir1 usb to learn and control several air conditioners a few years ago. It works great. Learning is tedious and repeat is necessary. I have got quadriplegic as well, thanks to girder i can freely control my stuff.
the most important thing on learning air conditioner remotes i that you must shoot your remote to the usb receiver and the next code you must discard, doing this ive got mine working