Hi cyhwebby, have you had a look at the template.php file within /wp-content/plugins/wp-e-commerce-related-products/includes/?
The current release by default displays a table grid which is vertical, I will make a priority to include a list-based template, unfortunately for now you’ll need to manually change the HTML within this template.php file from TABLE, TR, TD to UL, LI and then apply the CSS styles DISPLAY and FLOAT to list related products horizontally. I’ll add this as a feature in 1.7
