Some issues I found around NZTG, remembering that I just plopped my FS9 into FSX warts+all before running the patch.
Seems to be a misalignment somewhere for the grass runways:
not sure what it is but it's different from the FS9 one if I remember

I couldn't catch it, but there was a bright green flash-through from the grass runways as I took this
The refueling seems to have got stranded on the apron edge:
and a lost taxiway, also parking misaligned
I haven't installed GNZLAP in FSX so can't see Bay Flight, but did notice no little concrete pads around their area.
EDIT:
(After reading Robin's admonition below)
If you have an overdeveloped sense of tidiness,
and renamed your FS9 installation to RealNZTauranga,
and copied it over to FSX,
then the patch won't find it (Doh).
You will then get some funny effects
But not as strange as you'd expect, somehow.
Anyway, perhaps this will help some other dummy with a similar problem, later.