Changing Extra Information Page links in left column

Hi im working on my first install, and find zen cart really nice.
1 problem though.
Im stuck on how to change the links of the extra information pages in the lh column nav boxes.

Ive changed the following pages:

filenames.php:

define('FILENAME_PAGE_2', 'PhotoEnhancement');

define('FILENAME_PAGE_3', 'page_3');
...

page2.php

define('NAVBAR_TITLE', 'Photo Enhancement');

define('HEADING_TITLE', 'Photo Enhancement');

and even checked in tpl_page2.php,
what detail am i overlooking.
Thanks a mill.
-kevin

oh ok i found the file in the sideboxes/modules directory.

more_information.php

  if (DEFINE_PAGE_4_STATUS <= 1) {

    $more_information[] = '<a href="' . zen_href_link(FILENAME_PAGE_4) . '">' . FAQs . '</a>';

  }

changing that changes the link and the url but also gives me a 404
http://scaneveryphoto.com/index.php?main_page=FAQs

???

ive solved this problem by using the easy pages, but would like to know how fix the above problem anyway.
thanks