Thought I'd check in with you and let you know that I've purchased Photoshop Elements 7 and will be using that along with GIMP and Paint Shop Pro as my graphics editing software.
I've finally gotten back to my city map and have completed ALL my buildings -- both the "mass" buildings and the individual buildings.
I know that I have yet to "build" the castle as well as "clean up" the city walls and roads so give me some time yet.
Here is the map to date:
As always, any comments and / or constructive criticism is appreciated and actively solicitated.