1, use secondlife avatar in poser. download is here (Second Life Avatar Mesh)
2, make new folder on desktop, open it and make new folder "Runtime".
3, start Poser, and remove first figure. top menu [Figure] Delete Figure.
4, show library window. top menu [Window] Libraries.
5, push button [+] "Add Library" choose folder which you made to desktop.
6, new folder added to poser libraries.
7, "Second Life Avatar Mesh" uncompressed file put in character folder.
8, poser libraries window, select added folder and push (Refresh) button.
9, refresh folder and you see "SL Avatar" choose figure "Male" or "Female".