"DOS Here" is a wonderful item in right button menu. Here are Windows XP/2000 registry for it.
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\Directory\shell\cmd]
@="DOS Here"
[HKEY_CLASSES_ROOT\Directory\shell\cmd\command]
@="cmd.exe /k \"cd %L\""
Technorati : DOS, Windows