Most likely an AFCAD issue - make sure the same AFCAD exists in
\RealNZwanaka\Scenery\AF2_NZWF.bgl and
\World\scenery\AF2_NZWF.bgl
Search the FS9 folder for any others, and delete.
Wozzastang is stock, a touch of brake, together with a blip on the throttle and a smidgeon of rudder will turn it.
Sound is very difficult to capture - I took a video clip at Masterton which I've just watched (and listened to carefully).
I was standing behind the P-51 on startup, so I thought it would be a great sound clip too.
But the dynamic range is so large, the limits of the mic are immediately reached.
All you hear above the wind roar is the
prrrrrt of the prop, and hardly any engine noise.