Sorry if this has been posted before (I've only got though 30 pages of this thread so far).
We're currently having a lot of fun with the way Smart Template transforms the look of X-Cart. One thing we did change was on the (detailed) images tab we simply added a centre alignment for the images.
/skin/smart_template/custom/tabs.tpl
Code:
{if $active_modules.Detailed_Product_Images && $config.Detailed_Product_Images.det_image_popup ne "Y"}
{if $images}
<div id="tcontent2" class="tabcontent" align="center">
{include file="modules/Detailed_Product_Images/product_images.tpl"}
</div>
{/if}
{/if}
Which to our eyes looks a bit neater for images that don't occupy the full space.