I decided that I wanted a custom manicure, but was disappointed to discover that the UV mapping for the fingernails and toenails only allowed for a single color (or texture) to be applied. So. . . I remapped the UVs and now each nail can be unique. I've only made one "polish" so far but have saved all of my working files (blender, photoshop, etc) out on GitHub if anyone else wants to play around with it or make their own. I didn't modify the meshes at all, but since I changed the UVMapping for the nails, I rigged and re-exported those as .dae files that will work with the universal texture. The fingernail texture is on Aux1, and the toenail texture is on Aux2. I also put them in a box in the welcome area of my region.
My GitHub:
https://github.com/Araminta/araminta.github.io