Thanks Christian and Dave,
Dave I clicked on your 'signature' and was impressed. Do you spend much time creating scenery objects?
I can live with this (as I don't use external view very often) but just wanted to find out why. I guess there are possibly other visual differences between FS9 and FSX aircraft.
Strangely I found another model (DHC3) recently which does not creep forward when engine (turbo prop) is idling which I now use. I had posted a separate thread sometime ago asking why the 'creep' and received a few replies none of which stopped it other than manually feathering the prop after entering a 'session' and then have to manually change the pitch before taxi/takeoff.
I had found and downloaded a few different aircraft (same type and supposedly from the same author but different textures and all looked the same outside and inside) and one doesn't creep so I use those aircraft and air files and add the textures from the other ones. The one which doesn't creep starts up with the prop pitched correctly and seemingly idling at the same speed so the differences are somewhere in the aircraft.cfg or air files. I really don't care as I now have 'solved' that problem (aircraft creeping forward at (session) startup.
There is so much to learn how all these things work and so little time to learn
John