Are we even able to do that?
Why didn't you retexture the hair piece and the hair decal?
The hair piece can be textured to some degree, although there isn't much freedom in it. The texture is just a bunch of parallel lines for the hair, so anything placed in the texture is wrapped around the hair model rather than laid over the top.
Yes but you can replace the parallel lines with cyan, and Veronica's hair decal to cyan too?