Just thought I'd show the issue that this script addresses... In the image above, you can see how the rigged figure (skin tones, Sp3 with Muscular morph set in this case) does not ocupy the same space as the morphed prop (green), which does not have any of the Rig-Induced-Error. So if you used the exported, morphed figure in some 3D App to design your Muscular morph on a tight-fitting catsuit (for example), the results would not fit the figure correctly in Poser... exporting the morphed prop will give you the right mesh to shape your morphs to.

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