The Webshots Wallpaper & Screensaver is supposed to be added automatically, but in case this didn’t happen for you, please do the following:
Go to C:\Program Files \Webshots \Wallpaper. For some computers, this is C:\Program Files (x86)\Webshots \Wallpaper.
You should see Webshots. Right click on Webshots and then select install. It will install Webshots Wallpaper & Screensaver as your screensaver.