If I copy and paste from the 01Sculp zone and paste onto the hi-res square, then the Material Room displays normally; the PoserSurface and the two nodes are visible on the same screen. Likewise if I paste the nodes onto the pyramid primitive. When I copy and paste them back onto the Nykta hair in 01Sculp where they belong, the Material Room displays incorrectly - the way it appears in my screencapture.

To look at the model's cr2 file and the texture is applied... I have no idea what is normal and what isn't in those files. Also, I don't understand how looking at the cr2 file will reveal anything when the model with its base textures behaves normally. It is only when I apply the PHC textures to the Nykta hair that the 01Sculp zone displays incorrectly in the Material Room.