I just installed the PC-12 off Flightsim.com into fsx. When i select the aircraft then click go fly fsx crashes. I went flying with another aircraft and then changed it to the pc 12. It worked but the wheel textures were messed up..
It may be a 2004 aircraft or you might have the DX10 box checked (should be unchecked) in the graphics tab.
Either way, dump it and find another.