I saw a thread on this shifter setup on one of the sites. If I recall correctly, it does not have anything to do with the clutch actuation, so you still have to work the clutch pedal as if you were shifting with the normal shift lever. What it does is allow you keep both hands on the wheel, clutch, pull on the up/down shift paddle. Or I guess you could just hold your right foot down, pull the paddle and hope for the best
I'm interested to see how it works. It would take some practice - at least for me to remember to not reach for the shifter handle!
Later,
Brandon