JohnMark,

I am wondering which MX remote you are using. It is probably not an MX-500 like mine. Here is an idea which may or may not be helpful to you, depending on your remote. I discovered empirically that the DSP codes for my STR-DE935 amp could be "broken up" into smaller pieces and learned to a RS 15.1994 remote. In other words, I tried training from the original remote to the 1994 on buttons L1 and L2. Neither L1 or L2 worked, but when I hit L1 and then L2, the desired function (move to "normal surround" if memory serves) did work.

I think this has to do with the fact that the code is longer than the memory allocated per learned button. The MX-500 with IR-Clone has some "intentional overflow" capabilities which may prove useful. I found that with the new home theater, I no longer need to switch between normal and "night theater" mode, so I abandoned this effort. Now I get by using just the SFLD+ and SFLD- buttons, which I only need rarely.