If you don't use EZ Pages then you will have to edit includes/languages/english/extra_definitions/footer_menu_defines.php
and insert new definitions for them.
Using EZ Pages is not that difficult.
go to admin -> tools -> EZ Pages
click the "New File" button
Add a page title
Set everything except FOOTER to no (make sure you give it a sort order)
scroll down to
Internal Link URL:
add the link to your page - index.php?main_page=page_2
click the insert button
Do the same for your page_3 link.
make sure you have the ez pages footer status set to 1
and that's it.
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