I am hoping I can upload the file from a customers MSC400. Their previous installer went out of business. Even though I have somewhat extensive experience with URC remotes, programming over 500 remotes, possibly more, I have never programmed an MSC400. I have gone through the training videos and took the little quiz, but would rather not have to program one from scratch in a system that is already running ok. I just have to add an AppleTV. At least I now know that I will have to bring my XP machine and not my Windows 7 64 bit.