go <a href="http://www.iconfactory.com/cb_home.asp" target="_blank">here</a> and download candybar, they let you use it free for a few days. they have many icons available as well.
Yeah, there is a free way, click get info for the icons you have downloaded. In the info box, click the picture of the icon, and copy it. Then open the get info box for the application/file/folder that is the icon you want to change, click the picture of the icon you want to change, then hit paste, and the new icon will appear.
if you copy the icons manually like xionja explained, if you want the originals back - just apple - i for the info, then click on the image and delete it (del) - you will have back the original icons.
Comments
Is there a free way to do this?
But it sounds risky... do I lose my old Icons then?
i have only changed the one for my external harddrive.
i guess you could probably 'back up' the icon by assigning the old one to another file before you change it.