Hello,
Just to clarify you want an image in the template up near the cart icon? So no popup box and cart icon completely gone? If so just do the following:
Open up the index.php file and look for the below:
<?php if ($s5_box_one_cart == "yes") { ?>
<div id="s5_cartbutton" class="s5box_one"></div>
<?php } ?>
Replace it with:
<?php if($s5_pos_custom_3 == "published") { ?>
<div style="float:right;width:300px;">
<?php s5_module_call('custom_3','notitle'); ?>
</div>
<?php } ?>
Then just publish your image to the custom_3 module position.