Hey this is awesome, thanks!
I currently don't have the switch setup in a Scene, would the device still be available in the "Adjust Scene" drop downs? Sorry, don't have access to my ISY right now so I can't see it.
Yes, the Adjust Scene has two drop downs: One is the scene you want to adjust ("Romantic Dinner" or "Movie Night" or whatever) and the second is the device within the scene you want to adjust ("Overhead Cans Switch" or "Track Lighting" or whatever). For the sake of this command, each device is also a scene all on its own that has only itself as a device...this should let you do what you want.
I don't have access either, but I'm pretty sure that's what you want to do. That should achieve the goal of setting the local values. If not there's another command in the drop down to do it.