SetIcon is a small application that lets you quickly and easily set a custom icon for one your drives either from an ICNS file or any old image file that Mac OS supports.
All images are scaled to fit within the constraints of a 512×512 icon.
Set Icon applies custom icons in such a way that they appear correctly both in (Snow) Leopard’s side bar and in the Boot Camp chooser.
Just try it! Explore the secret to optimizing your Mac with very simple and intuitive steps.