I would reinstall Z2, I uninstalled after the upgrade too, if I was you, sculpt the model in Z3 then export the high poly as a obj, import this into Z2 (with the multidisplacement mapper installed) then reconstruct the sub divisions till you get it to where you want, then use the multi displacment exproter with the maya code (google it and you'll get it) then just export straight out, no ps work needed to flip ie etc etc then just use it straight in maya.

Trust me its a lot better.

Also theres an upgrade for Z3 now