When I downloaded the region maker, I kept getting an error for the assembly build. I went to the Microsoft® .NET download and repaired it. Ok it is building it fine, no problems. I launch SC4 look at the region and Oh No! The medium 2x2 cities are gone! I look at the region BMP and it is fine. I recolor the green squares with paint's bright green, relaunch SC4 and everything is great! Just a little tip.