in my original post I clearly explained which file I was working on
You better re-read your OP - no posting of any filename...and your snip was only your code &/or not enough to visually determine the filename
either my code is wrong (very likely) or its been added to the wrong place (not as likely) or its not possible (doubt it).
What page is this to be on???
If the first page of the checkout that displays after one adds to cart and above the "checkout" you should be working in a copy of includes/templates/template_default/templates/tpl_shopping_cart_default - So in a copy of this to be placed into your template structure -
Find this and add a div and your href+src right after the BOF line that starts this there
Code:
<!--bof shopping cart buttons-->
<!--bof My button -->
<div id="your_Div" class="forward">
<a href="http://store.realityshots.org/index.php?main_page=index&cPath=26">
<img src="http://store.realityshots.org/store/includes/templates/darkness/buttons/english/button_frame_options.gif"</a>
</div>
<!--eof My button -->
<br class="clearBoth" />
<div class="buttonRow forward"><?php echo '<a href="' . zen_href_link(FILENAME_CHECKOUT_SHIPPING, '', 'SSL') . '">' . zen_image_button(BUTTON_IMAGE_CHECKOUT, BUTTON_CHECKOUT_ALT) . '</a>'; ?></div>......
etc, etc, etc
<!--eof shopping cart buttons-->
You will find that in most all cases that display is contained in a tpl_ file and as yours is hard code - php not required - just normal html stuff