Instructions:

  1. Start Notepad
  2. Type
    [autorun]
    icon=filename, number
  3. Filename is the name of the icon file (exe, dll, ico)
    Number is the index number to use. (Some files have many icons, the number points out which one)
  4. Save the file as "autorun.inf" in the hard drive you want to change (c:, d:, e: and so on, do not use a subfolder)