Noob question about file icons on the desktop

I was wondering in windows when you change an icon for a file on the desktop it applies only to that specific file. When I change it in Linux it applies by file type which is a pain. I put a link to a shell script on the desktop and try to give it a unique icon and next thing I know all the shell scripts in the file system have the new icon. Any help is greatly appreciated. Bob __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com