I'm starting to get the idea, but I'm still struggling with the way
you're using terms differently than the way they're usually used to
describe things in Word.
For example, a "menu" in Word usually means the bar with File, Edit,
View etc. and the menus that drop down when you click those items, or
the popup menus you get when you right-click something in the
document. If that's what you mean, you can add your own menu items for
things such as macros and built-in commands by following the
instructions here:
http://www.word.mvps.org/FAQs/Customization/AsgnCmdOrMacroToToolbar.htm
You can certainly write one or more macros to open specific documents,
and then place items on a menu to execute those macros. By saving this
menu in a "global template" (one that's stored in Word's Startup
folder), the menu will appear whenever Word is running. But menus
don't "open with Word" -- they remain "closed" until you click them.
I still suspect, though, that what you're thinking about is a
userform, as described in
http://www.word.mvps.org/FAQs/Userforms/CreateAUserForm.htm
The userform could contain a listbox or combobox in which you list the
documents. When the user clicks a name in the list and clicks the OK
button, the code in the userform opens that document. By calling the
userform from an AutoNew macro as described in the article, it will
pop up whenever you use File > New to create a document.
I have no idea what the "additional interface" might be. Did your
instructor give you any further information?