Re: Adding new pages
It's not often I would describe a site as being "severely customized" but yours definitely is one of those. But that's not a bad thing, as long as you get everything working.
As to your problem... ordinarily More Information is a sidebox which contains links to other pages, none of which is usually called More Information. So step one is to determine/remember what was done to create your current MI page and to undo it.
It looks like all your sideboxes have been turned off. Temporarily go in and turn on the MI sidebox as well as the Information sidebox. You should see links to a bunch of pages. There are settings in admin which can put the links to those pages into your header bar. (And there are mods which allow even more control over what goes where.) Experiment to get the ones you want where you want, then turn the sideboxes back off.
Incidentally, your More Information page is really just your Contact page. You can see Contact Us appear to the right of your Home link when you go to your MI page.
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