I know how to change a files icon... http://www.hongkiat.com/blog/how-to-change-mac-os-x-leopard-icons/ But is it possible to change the the icon for a particular file type in general. For example... .flv files are a blank sheet by default. i want to change it so all .flv files show a quicktime icon without having to do them all separately... and so whenever i download a .flv file in future it will automatically assign a quicktime icon? Anyone? Many Thanks!