Shit, I am far from a Cubase master, I just know what I need to know to barely get by. I actually am not too fond of it, cause I'm the type of person to change my mind a lot and I hate that I can only undo one fuckin time. Also, that coupled with a couple vsts sucks my system resources down to nothing. With Rewire I suggest the best thing to do is check out
www.propellerheads.se they make reason and have a lot of info on how to rewire shit. My ReWire sessions are on hurt for the moment, because I did some foul shit to my Cubase program and it's sort of not working... lol
What version of Cubase are you using?