It uses "Room Perfect" which is one of the easiest RCs and it generally works very well. Full instructions are in the manual on page 28.
What do you find difficult?
FWIW, almost every local dealer/shop that I have dealt with has had no interest in adjusting or installing any piece of equipment that they have not sold. The prices that they quote are meant to deter you without saying either that they can’t do it or that they refuse to do it. If you live near me (NYC - UES), I'll do it for a beer.