http://codex.wordpress.org/Theme_Development tells all you need to know about creating and editing a theme.

So all you have to do is find/hire somebody (could even be yourself) with enough knowledge of html and css (and possibly php) to (1) add that link(s) to the new page(s) in the coding that makes the bottom part of the site and (2) make the new page(s) in such a way that they both contain the right info and the right look.

Kees