You can get around the overlapping uvs issue by creating props for the body parts you want a displacement for. For the head, use the grouping tool in P5, selecting only the Lips, Skin scalp, and Skin head. Group those materials together, and create prop. Export as a wavefront object file, and import into zb2. do not add the teeth, gums, eyelashes or eyebrows to the head prop, or the uvs will overlap. The same can be done for the rest of the body.