"usemtl fur" is a material group specification. It just signals the start of the set of polygons which are defined as having the material name "fur". If there really is extra geometry in the cr2 then you won't be able to re-map it without exporting it and modifying the cr2 to read it externally rather than contain it internally. All of the original Poser 4 figures have fully external geometry, however. It seems likely to me that you're seeing morphs in the cr2 rather than extra geometry. You don't need to worry about those. They don't carry material or mapping information.

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