I'll download the demo and give it a whirl but I wont have time to enter the challenge. At 422 I've watched the guy at the seat next to me sculpt stunningly realistic models (of a Neanderthal family) in only a few days in ZBrush. A different package but using similar principles. Also I know Chris Hunt has used ZBrush models as terrains in Terragen so something on these lines could be a useful adition to the Terragen armoury.
Cheers
Richard