geez, China is ahead of the US!
Check out one of these posts:
I've been working on a rocket simulator in my spare time to try out such a craft (nothing as simple as Orbiter; I want to be able to simulate everything, from the electrical system to CFD analysis of the craft in-flight). Who knows if I'll ever get it done, but it's fun. :)
No doubt, in between tokes .. who are these clowns, anyway?
(Note from recent experience: this is not meant to be criticizing you, et)