Sam,I think i did something similar for using V4 in 3dsmax in a more "efficient" worklow. I ended up with 1 bodymap and 1 eyemap. The one "bodymap" is made for an easy way to get V4 in zbrush for displacement and normalmaps. I made a layered psd template file with a "color select" layer so you can easely select a color and paste youre texturefiles. Maybe an idea to use?