download_free_must_have_icon_set.zip, 4.28 MB
Contains the icons in all sizes,
Windows, Mac and PNG formats

To Customize Desktop Icons

Windows XP

Click Start Control Panel Appearance and Themes Change the desktop background Customize Desktop.

Select the icon and click the "Change icon" button.

Windows Vista / Windows 7

Click Start Control Panel Appearance and Personalization Personalization or right click on your desktop and select Personalize Change desktop icons Change icon.

Select the icon, click Apply and OK.

Mac OS X

Are you in geeky mood? Use our Guide to change Dock icons in Mac OS X Leopard.