Hi Kevin
I just finished my initial 337 sim training in Portland at Avaition Training Center
http://www.serv.net/~atc/.
The good news: Great instructor, nice people, great location, beautiful school. I learned alot about the 337.
The bad news: they never got the sim to work with a centerline thrust. For some reason an engine out created a yaw to the failed side. Not a very big one, easily taken care of with the manual rudder adjustment.
Given that it was a Frasca 142 there really is not a reason that it will not work, if I can get my sim 2002 to work i know they can get their Frasca to work.
Adam