The models have been converted to native P3Pv2 format.
The plane has been tested in P3Dv5.4 so should work OK in all version of P3D from v2 up to v5.4.
I don't own P3Dv6 so that isn't tested.
Sorry but I was unable to make this one FSX compatible, every time I tried exporting the model for FSX it would break.
Also I usually like to strip the co-pilot from the VC but on this model doing so also strips out other parts of the VC.