Quote - Use the group tool in poser.

Call up each section of the figure with the group tool, then select all of the polys for that portion, rename them with one new consistant material.

Note that this will embed geomCustom references in the file and result in a new figure .obj being written out with a library save.

Quote - is there any way of deleting material zones directly in Poser? I just loaded a material wich had extra material zones and it 'added' this ghost material zones to the prop. Is there any way I can remove them?

You'd need to edit the .cr2/.pp2, or use a script within Poser (assuming one exists) which will alter the file.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.