Whoa, before doing anything else, let's examine exactly what this package contains. In the product readme, we have props, geometries, cameras, lights, and textures listed which tells us none of these files should go into Poser's Scene folder. The basic instructions recommend unzipping into a folder containing a runtime. Fair enough. This means if I do a simple extraction with a Zip utility program to a Poser linked folder, i.e., Download, everything will install in it's right place. No manual transfer of files/folders in this case. Straight forward installation. You should see all your Poser file icons under Props, Cameras, and Lights. This is as simple as it gets.

Word of caution, if you are using any OS as Vista of higher, you cannot install content in the parent Poser folder in Program Files. You may never see your content because of security constrains. Install content to a shared folder location and make sure that this folder is linked to Poser.