I've finished the first part of your tut, but can't find the export button...
Let's explore profrantasys help files...
I like it and I'm beginning to understand better the amount of work that goes in to Gandwarfs maps.
I've found a few features I'll explore a bit.. Using sheats to make multi leveled buildings and so on.
Ok, questions for the pros now:
-Using a bitmap as background.. possible?
-How do i add textures. Mostly thinking roof textures. Is it just to put a .png in the right folder and selecting it in CD?
-Where do i change the sun angle for the shadows?
-Can i export the roofs+shadows in a transparent png?
-Can i export just one sheat by just hiding the rest?

My first impression of usability is to build a rough map with full effect roofs and exporting just roof sheat to use in raster maps.
At least I'm having fun!