Ruby, this world is still in my game, I just can't finish it in CAW, but will once updated version of CAW come out. For now I'm building lots for it.
As for lot size, the bigest possible in CAW is 64x64, but you can create any weird size you want, not just those you can find in game.
If you have problems and issues with CAW, ask on tread about it, there are some nice tutorials too, and once you get used to it, it is very fun tool. I'm telling you this only because some other world requests are waiting for few months now, and you already have a great idea what to do in your world. If you have some questions about something specific, you can always PM me about them. But all that after new version is relesed.