If you use the command line window a lot, this hack will let you open a command prompt at the selected directory.
Navigate to:
HCR\Directory\shell
Create a new sub-key called Command under the main key (that is, the new key will be HCR\Directory\shell\Command). Change the value of “(Default)” within that key to the text you’d like on the right-click menu, for example, “Open A Prompt Here!”
Create another, new sub-key under the key created above, again called “command” (so this key will be HCR\Directory\shell\Command\command). Change the value of “(Default)” here to “cmd.exe /k cd %1”, without the quotes. Now right-click on a folder, and voila!