First, do you own Vicky (version3 or 4)?  Both can be downloaded from DAZ3D.  The files are packaged in their installers.  Click on the execution files and follow the installation wizard. 
Second, the Poser manual does not cover 3rd party installation; it is not part of the Smith-Micro's product offerings.  However, ContentParadise, in association with SM, does sell other 3rd party character content which are packaged in zip format.  RuntimeDNA also some unique characters.