Thanks!!!
Omag, yes, the VOZ switcher changes the whole world, with mixed results... areas with default landclass can look really terrible, the Grand Canyon is nice and red but the Eucalyptus trees around it look a bit funny. And I suspect when you "unvoz" then it returns default water rather than the textures you put in, but I can't confirm that...
Rimshot, sorry, not the iFly 747, they are from POSKY or other sources, all freeware.
Spyro, I couldn't believe the Australian Alps exist either, but they do, and lie in Victoria to the north of Sydney...
Final thoughts:
If I were flying into Australia in an airliner I'd probably choose the texture set corresponding to the area where I was going to land, even if I were flying over a different climate region...
...when over the sea before Oz I'd pause the sim, VOZ-switch the textures, unpause, change to a different season, change back to this season/date again, and the VOZ textures would be waiting at the airport ahead... a bit inconvenient, but only a bit.
However, I think VOZ is most suitable for low level flying only within Oz, preferably within one of the vast regions only... and if you have a great set of water/terrain textures, keep the files to hand so you can put them back in the sim after unvozzing...

Happy flying Down Under and wherever!
Krigl