Where are you content directories? The defaults on Windows are My Daz 3D Library in the Public Documents folder (used by the Daz Install Manager) and Daz 3DStudioMy Library in your Documents folder (used by DS as the default save location). So you would open the zip and dig down through the folders until you saw one or all of the Data, People or Runtime folders. Then you would highlight everything there (the Data folder, the Runtime folder and so on) and drag it to Daz 3DStudioMy Library where you would drop it, then say Yes when Windows asks if you want to merge the new folder with the existing folder. That should then place the files in the Content Library pane under DAZ Studio FormatsMy Librarysome folder or Poser FormatsMy Librarysome librarysome folder (depending on the format of the files).