往右键菜单添加“DOS在这里”

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Directory\shell\cmd]
@="进入DOS"
[HKEY_CLASSES_ROOT\Directory\shell\cmd\command]
@="cmd.exe /k \"cd %L\""
[HKEY_CLASSES_ROOT\Drive\shell\cmd]
@="进入DOS"
[HKEY_CLASSES_ROOT\Drive\shell\cmd\command]
@="cmd.exe /k \"cd %L\""

来源：http://hi.baidu.com/weidongzhen/blog/item/b4419d3ddc46c600bba16744.html