Although it should work with FSX acceleration, it does not. During the first installation, it was suggested to copy the download into a new-created P3d-folder (I don t have P3d) which is- of course- the wrong directory. I then copied it one time into the 'simmarket' folder and activated it into the scenery library: nice mountains but airport "flying" and distorted. Then deinstalled it completely (also library :-) and used the 'Addon Scenery' folder for activation into the scenery-library: same effect: nice mountains but "flying..."
So two star for the nice mountains but without airport...
I would not recommend it for FSX Acceleration users.