Potentially dumb question here - what would the proper way to call "setLevelInstant" be? I don't see it in the drop-down list in webCore... is it called by default if the duration is set to zero? I'm not home now to see light behavior and confirm if it's working or not...
I see the other two custom commands there (marked as custom), it should show just like those. First step would be to install the driver and make sure the command is showing on the device page. Then you need to get webcore to refresh the commands list for that device. I have no idea how to do that, I dont use webcore actually.