Desaturated= texture bump map. Other 2= your two bump maps (texture and 3 white dots). Do whatever= come up with the scenerio I have given you ("have the render come out as such: you get the standard texture bump, along with these 3 raised bumps on her forhead, as if she got hit and the result is a knot") by trying to place the two bumps in a configuration that will result in the above image. One standard head texture. One standard bump. One with three white dots on forehead (based on head map), black background (this results in your second bump).