The aircraft editor allows you to associate any physics component with a submesh by name. I believe that we are trying to eliminate some of the naming requirements, so publishing a list at the moment would be a little premature.
Also how many assignable switches will their be available to us
The switch assignment is all done in the aircraft editor [where the user edits the physics and radio programming], so the graphical models don't need to know anything about the switch assignments. In the editor you can assign any switch or control to manipulate any control surface or device on the aircraft.
You are basically limited to the number of channels that the radio has. The interlink controller has 8. At the moment we only support up to 8 channels with an actual transmitter too. So, for the time being, that is the limit. Just remember channels 1-4 [and 6 for helicopters] are usually reserved for the primary controls.