Scenario's - Custom Maps

Hey, I'm new here and I want to make a scenario that revolves around China. I need to edit the map so that it is just China, add more cities and countries within China but I do not know how. Could someone please tell me how to do this? Thank you.

You can't do that just yet but you will be able to in the future. Here's the post from Ivan and Amok about custom maps. http://afterwind.com/events/news_comments.php?news_id=66&page=&message_id=