Sounds like an interesting project there, guys.

I had an idea of making a mod sort of similar to this a while ago, though it had a different scenario set-up (check my sig for the discussion link). I definitely admire your project, though, and think it would be great if it could be done.
By the way, I should point out that,
according to Wikipedia:
Characteristics of the World Wars - The two World Wars of the 20th century took place on every continent on Earth save Antarctica, with the bulk of the fighting taking place in Europe and Asia. They involved more combatant nations and more individual combatants than any other conflicts.
So leaving out portions of the world will not make it
technically a "World" War mod.

But never mind, that's not too important I guess... just thought you'd be interested to know that.
Anyway, have fun, and good luck!

- LP