Last-word, run the installer (double left click or right click and select "Open").  Make sure you point it to your Poser folder and everything should extract to the correct places.  Now open up Poser and look in the Figures section of your library menu.  All the V3 folders/files should be there. 

"You don't know what we can see
Why don't you tell your dreams to me
Fantasy will set you free." - Steppenwolf