I was so overexcited when I saw this thread that I couldn't resist but finally register here to say that this looks INCREDIBLY AWESOME and to offer some help with mapping (since you're asking for it anyway
I doubt I can pm you, 'cause this is my first post here and it needs to be verified, so I'll ask for textures here, can you send them to me please?
Anyway here's some screens of one of my projects, to show my mapping style (though they're kinda old, I think I've improved a bit since this):
(Just in case you're wondering, this project died due to a HDD crash)
(And btw, I'm not a native english speaker, but I hope I wrote everything correctly)