Main page content boxes: information sidebox, where does it originate?

I need to change links in the information sidebox. So I started at the index.php and sort of reviewed the page creation flow, but can't figure out where side boxes get inserted into the main page after the index.php request. Where is the base code for the information sidebox, and if you can help with this also please, where are the links connected in html code to the various pages which default has as text/links to:

Information
Shipping & Returns
Privacy Notice
Conditions of Use
Contact Us
Site Map
Gift Certificate FAQ
Discount Coupons
Newsletter Unsubscribe

Thanks for any information or tips

10west:

I need to change links in the information sidebox. So I started at the index.php and sort of reviewed the page creation flow, but can't figure out where side boxes get inserted into the main page after the index.php request. Where is the base code for the information sidebox, and if you can help with this also please, where are the links connected in html code to the various pages which default has as text/links to:

Information
Shipping & Returns
Privacy Notice
Conditions of Use
Contact Us
Site Map
Gift Certificate FAQ
Discount Coupons
Newsletter Unsubscribe

Thanks for any information or tips

includes/filenames.php
includes/languages/english.php
includes/modules/sideboxes/information.php
includes/templates/template_default/sideboxes/tpl_information.php