GenX Photo Scenery in P3D - problem with hi-res textures

[TrafficPilot 121]

I've successfully managed  to install the 2.4m textures from my Playsims Generation X UK Photographic scenery into P3D. The problem is if I try and use the higher res textures ie 1.2m or 0.6m it won't load them properly. You can see them appearing from "top view down" but not ahead or beside the aircraft in flight. 

 

It would be nice to use the higher res textures that come with GenX. Anyone else have any tips or ideas please?

Thanks

Adam