If u haven't already got a shortcut to Windows explorer, make one, right click and select Properties.
Change the target to (for win9x/ME) explorer.exe /n, /e, c: (for c-drive) or explorer.exe /n, /e, d: (for d-drive) etc.. For win2000 change to %SystemRoot%\explorer.exe /n, /e, c: ( for c) or %SystemRoot%\explorer.exe /n, /e, d: (for d).