Easiest way to add more buttons is thru nesting. Copy mainbuttons.py to a new name, e.g. mybuttons1.py, and use one button in mainbuttons.py to call mybuttons1.py, which in turn can call up to 9 new .py scripts in buttons 1 thru 9. For button 10 put in a call back to mainbuttons.py. Placing nested calls in each of the original 10 buttons will give you 90 scripts within just 1 level of nesting.