I really dont have time to make up a whole tutorial on this right now, I'm trying to finish a project. It is much easier to do this with V4 exported out of Poser unwelded because you have body part names to work with. Using lithunwrap or uvmapper(maywork Im not sure) You go in select all the body parts that belong grouped together, invert your selection and hide. What your left are the components you just grouped, with these selected you scale them to .50 then move them out of the way so you can work with the rest of your model, continue to do this so that you end up with all the face components isolated and scaled to 50%, then all the limb components isolated and scaled to 50% etc. You then take each grouping as a whole and position each in its respective quadrant doesnt matter where each goes.

Then save the model and save the map. Litunwrap will export a max 4096map

so I bring it into PS and resample to 8192. Use this model to work with in ZB.

If you crease the model before sudividing and avoid using the smooth brush around seams this should work ok