To clarify what EnglishBob said: you don't need to include the rsr files under the RuntimeGeometries folder. These files are only used by Poser 4 and if they're not found, Poser will simply re-create them.
Poser 5 (and above) doesn't use these rsr files anymore.
Basically, these rsr files just take up space in the zip file. ;)
 
But, don't confuse these with the rsr thumbnail files found in the RuntimeLibraries folders, which are needed to see what the item looks like.

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