I just finished putting together a sim model of the Flyzone Sky Fly RTF model, for use with FMS. It can be downloaded from here, if you're interested: [link=http://users.eastlink.ca/~leahdave/skyfly.zip]skyfly.zip[/link].
Please let me know if you run into problems you think I can help with. The model is generally pretty close to the real thing, although I think the sim has a bit more power and responsiveness.
Dave