Here's what I did:

Set up two registration banks. A different style and a different favorite instrument for each button. I set the freeze button so that when it is used, the style, key, and temp won't change. So when I have the freeze button pressed, I have immediate access to 8 of my favorite instruments. I change registration banks and I have immediate access to my next 8 favorites.
Next, I put a thin strip of paper with tape over it labeling the two instruments dedicated to each button. If you do this, the buttons are 3/4" apart. If you would like, I can send you my Word document where I made the label. I just cut out the line of words, and put scotch tape over it and taped it below the buttons of the keyboard.
Now, without the freeze button pressed, I have 16 registrations. If I don't want to use the instrument associated with the registration, I can always press a One Touch Setting. If I have the freeze button pressed, I have another group of eight one touch settings.
Cool idea, huh?

Larry