Windows – Keyboard shortcut for Windows explorer context menu items

There are two answers here, depending on exactly what your question is:

• If what you want to do is just what your example states, try this:

  • Launch Terminal, and open its preferences ⌘,.
  • In the Settings preference pane, select Pro in the left-hand column.
  • At the very end of the left-hand column, click the Default button.
    
    

  At that point, you'll find that ⌘N now opens a new window in your preferred style, and ⌘T does the same for a new tab.

• If your example was just an example, and it's some other app where you want to add a keyboard shortcut, you should be able to do it via System Preferences → Keyboard → Keyboard Shortcuts → Application Shortcuts → +.

  As @Nano8Blazex said, you can usually just enter the name of a nested shortcut and it will work fine.

This seems to be what you're looking for: http://www.techspot.com/guides/210-edit-windows-extended-context-menu/

This involves using a small software utility 'ShellMenuView' which doesn't require installation and is compatible with 'everything from Windows 98 to Windows 7 x64'. You can download the utility here (32-bit | 64-bit).