I commented, I sculpt in zbrush 4 displacement maps for my M4 and V4, then export (multimapsexporter) them and use them in poser 2012 .

what I'm looking is load my model (v4 or m4) in zbrush with UV (that's no problem) and then apply existing displacement maps to the model in ZB for the purpose of  continue sculpting or modify the original displace map , no starting from 0 but rather from those already made

I tell you that I could do in this 3dcoat (vercion trial ) and I read that in photoshop cs5 extended vercion also be done but  the problem is  I have Zbrush4