As I've said it's my understanding his 2-zone cymbals just use a modified KR circuit attached to a small piezo for the edge triggering. The bow is straight piezo. Should work the same as any other piezo/switch trigger. I don't currenlty own one but I'd think you'd set Dual Head = Yes, and the Rim = Switch, and it should work.
It would be helpful if someone took a close-up macro photo of the electronics in the project box so we can confirm that's what it's really doing.