Have you tried creating a full body morph?

Figure>Spawn Full Body Morph

Then delete all the other morphs and save the figure back to the library with a new name (so you don't overwrite your existing V4). Go to your preferences first, and make sure that you have "Use External Binary Morphs" checked under the Misc. tab. (I think it's checked by default). This will store your morph targets as .pmd which is more efficient than .pz2 morphs and doesn't bloat the figure's .cr2

You will have to transfer the custom morph to all the clothing you intend to use. You can do this via the fitting room or by hand in zbrush for a more accurate fit.