SF, I've seen greyscale maps used as specularity and notice a slight difference than bump maps.

But I also have to be careful on bump maps and adjust the contrast somewhat or I get glaring white ares in the actual texture when I apply them.

3D Paint makes specularity maps so I may use it again and see if it does the job.
Usually I don't make specularity maps but seeing how good it makes your work look, I gotta learn to do it right. :)

For UV mapping, I use the free UV Mapper but there is a better and pro version of it.
Makes UV maps easy to learn.

Let me introduce you to my multiple personalities. :)
     BluEcho...Faery_Light...Faery_Souls.