Bee Icons http://www.beeicons.com/themes.htm
Shareware (easy to find the fix)
Bee Icons - one of the most powerful and easy to use tool that allows you by means of only several mouse clicks to replace a lot of shell icons to those ones you do like.
The program is settled for Windows 9x/Me/2000/XP and allows to change icons of the Desktop, Start Menu, any Drives, any Folders, and all file types. Using Bee Icons, you can easily shift one or a couple of icons or even all icons using icons themes.
More themes on the site.