Unless it has completely different design principles from all other HiHat pedals (branded and DIY) I don't see a reason why it shouldn't work with MegaDrum.
No, It won't work at all since it has only one output jack for both the controller and the dual zone cymbal, it has a special functionning that is explained here on the 2 box forum : http://www.2box-forum.com/index.php?topic=973.msg10186#msg10186. Maybe if you try to separate the controller output from the cymbal output you could get it to work but is it worth ? Not sure