How to add "Dos prompt (cmd)" to explorer menu

To add "cmd" to explorer menu in Windows 7,
1. start --> run --> regedit  -->  \HKEY_CLASSES_ROOT\Folder\shell
2. make a new key (cmd)
3. make a new key (command) in the created folder (cmd)
4. modify "(Default)" --> value data -->  cmd.exe /k pushd %1