I'm looking for instructions on using the "LEARN" mode function on this remote. It has a 3 position switch at the top right of the remote. Labeled : A, B - SUB ROOM & LEARN. I'm assuming that when you switch it over to the LEARN position, it has the ability to find or "learn" the codes for your various audio/video components and store them in its memory. I've tried different combinations with the function keys but, haven't been able to figure it out. Please, help!