Quote from Jabberwock xeno
well, is there another mapper for windows that colors by biome?
A releated question: can it be modded, or made possible in the texture pack to have blocks other than grass and leaves to be colored differently in different biomes?
Vanilla mcmap, Eihort, Mine Mapper, and minecraft overviewer all support biome coloration and all have Windows builds.
As for your other question, you'd have to alter the source of mcmap but it would be possible. The feature is not planned.