Tried using the Corsair from FS2002, merely moving aircraft file to FSX. It shows on the list of aircraft. When selected, a no visible model warning appears. In flight, it is invisible from the outside. The indide is visible instrument panel without gauges. Sounds are there, flaps, gear, engine. (It launches with no fuel.) Checking the fuel and payload reveals a negative amount of fuel, which cannot be changed. It will be somewhat controllable in a nose down dive, but the airspeed is way off, almost at a stall.
Appears sounds are correct, problem with gauges, model, and air files.
If the model between versions is incompatable, is it possible to change formats with only the files from the prior version of FS alone?