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DAZ|Studio F.A.Q (Updated: 2020 Sep 04 1:56 pm)
Subject: NO IDEA WHAT I'M DOING
Yes, everything should go into the DAZStudio Library if the zip is set up in its conventional hierarchy. The Library folder on a fresh install of DS is called 'My Library' located within DAZ 3D>Studio. Which OS are you running on your machine? Also, what is the name of the Renderosity content are you attempting to install? I would like to take a look at the webpage read me file, it will give me some insight on how the zip is constructed and the files within. If you could provide a screencap of the zip content, I can see what's going on.
Make sure the zip hasn't added an extra Content, My Library, or My Daz 3d Library folder inside your content directory - if it has you need tot ake everything out of that (the Data, Runtime, and other folders) and plae it in the actual content directory (where it should merge with the existing folders). Also, bear in mind that manually installed content will appear only in the Content Library under Daz Studio Formats>content directory name, it won't appear in any of the category or product views.