The mountain looks great, and the farmland's the right colour!
I tried this scenery on top of my own simple Taranaki addon, and it works fine. With this scenery I can forget about crude lanclass polys, and concentrate on adding the missing airports and landmarks.
Here's a shot of my own New Plymouth and farmland replacements blending into the photoreal mountain:

You can see where my darker Puakai Ranges forest landclass meets the photoreal scenery.
I flew over the NZMQ helibase, the only airport I added that is on top of the new photoreal scenery. It looked fine - in fact you can see how closely things line up:

You can see my four tanks, and the aerial images of them nearby. Also you can now see the two pipes leading to the two gas flares that I put in - cool!
David.