Guide on How to Make Screen Savers in Windows XP and Vista

Can anybody guide how to make a screen savers in Vista and in XP

Ace Pro Screensaver Creator

http://www.nufsoft.com/screensaver_creator.php

From rapidshare

http://rapidshare.com/files/143424889/Screensaver-Creator-3.61.zip.html

Or

http://www.4shared.com/file/42187879/1c5a42a0/nufsoftaceproscreensavercreator350.html?s=1

Check these Sites

http://www.dd2002.com/

http://www.mrfreefree.com/free_software/create_your_own_screensavers_free.html