Yep, dongle just needs to be flashed for pixelnet. That said, I really think it is handy to have at least one dedicated ssc with test firmware on it for burn ins and fooling around. I actually enjoyed just letting the test firmware run the color changes with the lights.
Do not be scared of the mod, it is simple and rat shack has the resistors for like $1. For the cut, I prefer some black tape to cover nearby traces and use a cutoff wheel and dremel.