Hello, hoping i can get some help here, many a year ago, I was very active on Poser, I have galleries under Tcat and Larbac. It has been a very hot minute since I have been on it and of course things change. I just recently download poser 13, and for the life of me I cannot figure out how to get figures I have purchased or free stuff from renderosity  into Poser so I can use those figures.  IS there anybody that can lend a hand to an old artist wanted to get it going again?

I always do it manually, so for manual installs:

Download the purchased or freestuff file. It should be a zip.

I put my zips in a folder I call UNZIP. I unzip them there.

The unzipped files should have a folder hierarchy inside with Runtime/Libraries/(followed by different subfolder names). Some of the freestuff doesn't (although most do), so you'll have to create these folders yourself.

I go into each unzipped folder, copy the Runtime folder, and paste it into my POSER 11 CONTENT folder. I put everything in there, even though I'm using Poser 13 now. Whatever Poser content folder you paste it to, it should have a Runtime folder as a direct subfolder. Everything should paste in the proper subfolders of Runtime.

That puts the library elements in place. You can subsequent rearrange them in the LIBRARIES subfolders, if you like. I do. I have my own subfolder subsets.

The purchased and often the freestuff zips also contain Documentation folders not included in the Runtime folder. I copy and paste them to my dedicated Documentation folder, which I have split into Readmes and Templates subfolders.

That's how I do it manually. You can always read the instructions on how to do it using the Install tab. This is what the manual says to do:

Installing Content from a Zip Archive

When you purchase Poser content, it is frequently arranged in the appropriate Runtime subfolders for you, and is packaged in ZIP file format. The File > Install from Zip Archive command allows you to unzip content from a ZIP archive. The dialog prompts you to choose any library that is currently configured in your library preferences, including external libraries. You also have the option to specify a folder that is not yet configured.

To install content from a zip archive:

1. Choose File > Install from Zip Archive.
2. Locate the ZIP file that you want to install.
3. The Install Options dialog appears, and prompts you to choose an install location

• Runtime: Use the dropdown list to select one of the Runtime folders that you have configured in your Library palette. The dropdown list also includes libraries that you have added as External Runtimes as described in Adding Libraries. 
• Other: After selecting the radio button, enter a path to create a folder in another location. For example, if you want to create a runtime folder named Test Folder on your D: drive, enter D:/Test Folder. Then you can add that library as an external library as described in Adding Libraries.

1. Click Install to unzip the file to the specified location. The zip file will be unzipped to the location you specified.

See my reply here: https://www.renderosity.com/forums/comments/4493711/permalink