Replace;
Code:
<p id="productInfoLink" class="productGeneral centeredContent"><?php echo sprintf(TEXT_MORE_INFORMATION, zen_href_link(FILENAME_REDIRECT, 'action=url&goto=' . urlencode($products_url), 'NONSSL', true, false)); ?></p>
With;
Code:
<p id="productInfoLink" class="productGeneral centeredContent">
<a href="<?php zen_href_link(FILENAME_REDIRECT, 'action=url&goto=' . urlencode($products_url), 'NONSSL', true, false)); ?>"><img src="<?php echo DIR_WS_TEMPLATE_IMAGES; ?>moreinforimage.jpg" border="0" alt="More Information" /></a></p>
you will have to change the image name moreinforimage.jpg you wish to use for you more information image, and put that image into your;
includes - templates - yourtemplate - images folder