Atomicunderware:

Ok, I tried the toggle function. It works, but not if I send a program change.

Not really clear what your problem is. In what way does it not work if you send a program change ?

What do you mean by engage/disengage ?

What do you mean by "should be able to select the bank with a program change message" ? You cannot select a bank with program change – you can only select a specific preset.

Assuming by patch you mean preset, what do you mean by "and then turn that patch on and off " ? Do you mean bypass ? If so, how are you trying to do this and what happens when you do ?

A video is not required – just full information and clear terminology.