That would probably require mapping and that most likely was a body mod, rather than a tattoo mod. I've completely forgotten about this mod though, sorry, will get back to it in a bit.
I've already found out how to do colored tattoos, so I'll add some next release.
About quality though, I can't change the texture sizes, no matter how high def the real player tattoos are, I can't make them that high def, since the neck tattoos are 64x64, hand tattoos are varied from 32x64, 64x32 or 32x32