So, let me be more specific. Most of the songs needs more than one variation - during the song I have to change 3 or 4 times the sound. My idea is to call by midi the first program within the 5 program bank (on pc4se is 50 banks by 5 programs) and then just go through changes pressing the favourite programs (2, 3 etc...). That way I don't have to scroll through the banks I just press the song on my tablet and everything is ready to go (I need to be fast). The workaround would be that choosing the program would trigger the bank where the program is setup. Either ways I couldn't find, unfortunately.
I have a workaround which is working, but I'm surprised Kurzweil didn't use favourite banks in more ways than just simply addressing programs to it.