Export Provinces Color Map

Use this option to generate a big texture file with all provinces colored with random colors:

Then use the ImportProvincesColorMap() method to create new countries based on the province colors. Each unique color will produce a new country and all provinces sharing the same color will be remapped to that country.

You can use an image editor like Gimp or Photoshop (or a custom C# script) to recolor the provinces. If you want to remove a province just color it with transparent color (alpha = 0).