Shit, you cant, the only way to do it is to use reason like a plugin in cubase or any other host via rewire. That host will be used to midi connect the triton. So, you write a score within Reason itself and you write a score for the triton in the host application, in that way everything should runn in sync. So basically it's crap hehe, because you have to use 2 programs while it could've been reason itself if they only applied midi out to it.