I have put together a series of tutorials on how to modify these define pages in Zen Cart:
http://www.kerrinhardy.com/2010/01/12/more-information-zen-cart-sidebox/
The relevant tutorials are:
- Update Page Heading of Page 2, Page 3 or Page 4 in More Information sidebox
- Edit contents of Page 2, Page 3 or Page 4 in More Information sidebox
- Edit name of link to Page 2, Page 3 or Page 4 in More Information sidebox
- Update Page Title of Page 2, Page 3 or Page 4 in More Information sidebox
However, if the footer addon isn't using the Zen Cart functionality and actually has the 'Page 2' link hard coded, you will need to modify this in the footer add-on template file.
Hope this helps.