If I'm understanding the question correctly you want to have more parent pages than what display in the Nav Menu at the top of your site. And you will do this using the "Include In Menu" option on the page. Correct?

The problem is that once you set the page to not be included in the menu it will not appear in any of the automatically populated menus that I am familiar with.

There are a couple of ways to to this:
1. Use an HTML Module in your footer that contains links to all of the parent pages
2. Use the Links Module in your footer that contains links to all of the parent pages

You can set either of those to display on all pages so that updates will be automatically made to all pages simultaneously.

The problem with either of these is that if your Nav Menu changes often you will also have to update the footer. If your Nav Menu is fairly static it shouldn't be much of a problem though.

Hope this helps, good luck!


Josh