|"If you go to the top menu, "Help"..."About" it should list the product key in a new information window."|
....assuming Office 2000 has been installed and is still there, and it's working fine, in the Help for Office 2000.
If Office 2000 has been installed and is still there, you may be able to find the key even if it doesn't work properly.
"....there are a number of utilities that can retrieve the key from a working program. "
Search the web for: Keyfinder, made by Jellybean something.
It finds the Product Key for the current version of Windows you're booting from, and for many if not all Microsoft products.