I usually download and unzip the archive into a temporary folder. I inspect the folder structure of the unzipped archive and if it corresponds to the standard Poser runtime structure, I simply copy it into my Poser content runtime. I usually create external runtimes so that my content does not mess up the main runtime of the Poser software. If the folder structure does not correspond, I move and/or create the missing folders before copying the unzipped runtime archive over to my content runtime. The Poser file structure is:

Runtime

-- Geometries

-- Libraries

---- Camera, Character, Face, Hair, Hand Light, Materials,Pose,Props, Scene (these are all same level sub-folders under Libraries)

-- Textures

If there is no file structure, you can infer the folder from the file extension:

Camera = cmz

Character = crz (sometimes with an accompanying obz and pmd formats)

Face= fcz

Hair = hrz

Hand = hdz

Light = ltz

Materials = mcz

Pose = p2z

Props = ppz (sometimes with accompanying obz and pmd formats)

Scene = pzz

The Libraries folders folder-name spellings are critical and Poser must have them spelled exactly as mentioned, otherwise, it will not read the content.

You may find texture files inside the sub-folders, which are readable by Poser 11 (was not the case for earlier versions of Poser).

Hope this helps a little.

Eternal Hobbyist