Hi,
try
Addon file editor, this module allows you to edit the template via Backend (HTML knowledge required).
Another way could be to build a WYSIWYG section with the linked images once and include this into the other pages (search forum for "global blocks").
Last but not least - but this is merely for advanced users - you could also generate an image navigation with show_menu2() by using css classes and IDs.
Regards
-instantflorian.