To change the icon used for specific drives in Explorer

Start Regedit
Go to HKEY_LOCAL_MACHINE / SOFTWARE / Microsoft / Windows / CurrentVersion / Explorer
Create a key called DriveIcons
Within DriveIcons, create another key with the drive letter you want to change (..\DriveIcons\K)
Create another key within the drive letter key called DefaultIcon
Set the default value equal to the icon you want to use.
If you have a file that has more than one icon in it, such as a DLL file, use the standard C:\full_path\icon_file.dll,x
where x is the number of the icon within the file icon_file.dll.