I am having this same exact problem with my Vista. It is putting the stuff into the Virtual Store. The manual loading is time consuming. I have hundreds of items to reload.  The "install from zip archive" used to work just fine on my computer but then I had to reformat and reload Vista and all my programs. Now Poser Pro is not working the way it used to with respect to uploading zip files. It does not have any trouble with the Daz .exe files, only zips. 

I am certain the problem is with the operating system, but I don't know how to fix it. If anyone has any other suggestions on how to force the operating system to make an exception for poser, that would be a good solution to this problem I think.

"People who attempt define what art is or is not, are not artists"---Luminescence