Opening a DOS Window to either the Drive or Directory in Explorer

Add the following Registry Keys for a Directory:
HKEY_CLASSES_ROOT\Directory\shell\opennew
@="Dos Prompt in that Directory"
HKEY_CLASSES_ROOT\Directory\shell\opennew\command
@="command.com /k cd %1"
Add or Edit the following Registry Keys for a Drive:
HKEY_CLASSES_ROOT\Drive\shell\opennew

@="Dos Prompt in that Drive"
HKEY_CLASSES_ROOT\Drive\shell\opennew\command
@="command.com /k cd %1"
These will allow you to right click on either the drive or the directory and the option of starting the dos prompt will pop up.