Sure you can.... This example is if you want the images on the left column
includes/ templates/ your_template/ common/ tpl_main_page.php
Find this:
<div id="navColumnOneWrapper" style="width: <?php echo BOX_WIDTH_LEFT; ?>"><?php require(DIR_WS_MODULES . zen_get_module_directory('column_left.php')); ?></div></td>
Notice below, how I added this image, you will do the same for twitter... etc...etc...
<div id="navColumnOneWrapper" style="width: <?php echo BOX_WIDTH_LEFT; ?>"><?php require(DIR_WS_MODULES . zen_get_module_directory('column_left.php')); ?></div><div align="center"><script type="text/javascript" src="https://sealserver.trustwave.com/seal.js?style=invert"></script></div></td>