I figured it out. There were problems with the output code. Well not the code itself, but the variable. I simply took two original lines of code (see below) and made duplicates but changed the products_price entires to prodcuts_retail_price. It worked like a charm after that!
$products_price = '<s>' . $currencies->display_price($product_info['products_price'], tep_get_tax_rate($product_info['products_tax_class_id'])) . '</s> <span class="productSpecialPrice">' . $currencies->display_price($new_price, tep_get_tax_rate($product_info['products_tax_class_id'])) . '</span>';
to
$products_retail_price = '<s>' . $currencies->display_price($product_info['products_retail_price'], tep_get_tax_rate($product_info['products_tax_class_id'])) . '</s> <span class="productSpecialPrice">' . $currencies->display_price($new_price, tep_get_tax_rate($product_info['products_tax_class_id'])) . '</span>';
and then the else statement
$products_price = $currencies->display_price($product_info['products_price'], tep_get_tax_rate($product_info['products_tax_class_id']));
to
$products_retail_price = $currencies->display_price($product_info['products_retail_price'], tep_get_tax_rate($product_info['products_tax_class_id']));