For those interested, I finally figured out how to add Pinterest onto the product page.
Here's the instructions:
1) Go to: Display->Views, under all templates, look for your current template. Then look for "show_default" of the front end view "product".
2) Look for this code:
<?php
$pluginsClass = hikashop_get('class.plugins');
$plugin = $pluginsClass->getByName('content', 'hikashopsocial');
if (@ $plugin->published || @ $plugin->enabled) {
echo '{hikashop_social}';
}
?>
3) Below that, add the follow code:
<span class="_hikashop_pinterest"><a href="http://pinterest.com/pin/create/button/?url=<?php echo hikashop_currentURL(); ?>&media=<?php $image = reset($this->element->images);
echo $this->image->uploadFolder_url . $image->file_path; ?>&description=ADD_YOUR_DESCRIPTION_HERE" class="pin-it-button" count-layout="horizontal"><img border="0" src="//assets.pinterest.com/images/PinExt.png" title="Pin It" /></a></span>
4) Where it says ADD_YOUR_DESCRIPTION_HERE, make sure all ",", ".", "?", "#", "$", "&", etc, are in html codes.
5) To control the CSS for Pinterest, add: ._hikashop_pinterest {} to your template CSS and add in the appropriate CSS controls.
Good luck!