Can editing one patch affect all instances?

EDIT - someone already asked this question.

This is a workflow question - I'm wondering if it's possible, given a concert where a single patch might occur many times in the overall order, to edit one of those instances and have the rest instantly reflect the change? I know that you can option-drag to duplicate a patch, but it seems that the duplicate becomes an independent copy. It would be faster and more efficient for my situation (synth programming for a musical) if there was a way to do this. Otherwise, it seems my choices are to delete and reload each instance of a named patch every time I want to change how that patch sounds across the concert, or to write some kind of script to send program change numbers in a specific order to mainstage.

Any help is much appreciated.