Hello, my name is Rusty. I can help you.
Your registration buttons C-8 thru C 12 are your bank registrations. You can save them to those and recall them. Each press of C8 cycles through the banks, and each press of C 9 thru C 12 will pull up your different presets in that bank.
Configure the tone you want to play. Press C 8 and use the dial to select bank 1. While holding down the C-13 store button, press C-9.
Now all you have to do is press C 8 then C 9, and it will load your preset.
Well, yes, that is the concept. You start on bank 1, and save your first song to C-9. Save your next one to C-10, 11, 12. Then you'll need to switch to bank 2, then C9, 10, 11, 12, and so on. That is how the presets are set up on this keyboard.
There are ways to do it with midi, but you're looking at some pretty extensive programming that I cannot offer from here. You will only have to hit more than one button every 5th song, so twice a set.