There is, in fact. but you would have absolutly massive amounts of work trying to get the *bmp that it would create back to a usable form.
The Dragon packages have a Mul2Bmp.exe that does this, but the problem is, it will make a Neon Yellow color for any 'transition' tiles that you have.. Like, where forests transition to Grass.. Dirt to Forests, and all of that.. Coast lines, mountain edge transitions.. everything. You would probably be able to repaint your map faster.
Your only other alternative would be to use other programs like World Forge, U Landscaper or best yet, Punts
World Maker to do any map work.
Sorry.