Windows 2000 lets you assign a different icon to drive letters. To do so, complete the following steps:
Start the registry editor (regedit.exe).
Navigate to the HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorer registry subkey.
From the Edit menu, select New, Key. Enter the name DriveIcons.
Select the new key, select New, Key. Enter the name of the drive (e.g., C).
Select the created key, select New, Key. Enter the name DefaultIcon.
Navigate to DefaultIcon, then double-click the (default) value.
Set the default value to the DLL containing the icon and the icon number (e.g., icons.dll,-24 is icon 24 in icons.dll). Click OK.
Close the registry editor.
You can click F5 (refresh) in Windows Explorer to show the new icons.