what you mean about not changing 50+ pages?
If you have several pages it is easier to use a wysiwyg program like dreamweaver. Frontpage 2002 is no good under my standards. At least as a minimun use FrontPage 2003. They use a similar interface than dreamweaver where you can see the design and the code at the same time, and learn HTML in the process.
Anyhow, depending on what server technology you use (Apache or IIS) you could use server side include parameters for the menu, that way you only change 1 file and all will look updated.
The correct way however is to use CSS, and since all pages will call the same css, when doing design changes it applies to all pages