1) Right Click on the below file: FootworkzScreensaver.scr
2) Choose Save Target As...OR... Save Link As...
3) Save the downloaded file into either:

c:/windows/system32 (2000, XP)
c:/winnt/system32 (for Windows NT)
c:/windows (for Windows 95, 98 or ME)
%windir%\System32 (for Windows Vista)

4) Lastly, open the Control Panel, click on Display, click the Screen Saver tab and choose your new screensaver from the drop-down menu.
4) For Vista: Go to Personalize, Screen Saver, and select your new screen saver from the list to make it active