the path to the CSSMenuWriter/cssmw_content/menu.php file is relative to the document location.
the menu file will be at the root of the site so for a documet in a sub directory, you will need to modify the path.
\tiles\bathrooms\ceramic2.php the path needs to go down 2 directories to the site root, then look for the CSSMenuWriter/cssmw_content/menu.php file:
<?php require_once("../../CSSMenuWriter/cssmw_content/menu.php"); ?>
like i said before, if you change the Create Links relative to option to document, then recreate the site using Site Assist, the pages will be created with the correct paths.