<?xml version="1.0" encoding="utf-8"?>
<modification>
<name>SKU in Store</name>
<version>1.0</version>
<code>SKU in Cart</code>
<author>Otvet</author>
<file path="catalog/controller/product/category.php,catalog/controller/product/manufacturer.php,catalog/controller/product/search.php">
<operation>
<search><![CDATA[
'name' => $result['name'],
]]></search>
<add position="after"><![CDATA[
'sku' => (empty($result['sku'])) ? '' : $result['sku'],
'location' => $result['location'],
'upc' => $result['upc'],
]]></add>
</operation>
</file>
<file path="system/library/cart.php">
<operation>
<search><![CDATA[
'model' => $product_query->row['model'],
]]></search>
<add position="after"><![CDATA[
'sku' => $product_query->row['sku'],
]]></add>
</operation>
</file>
<file path="catalog/controller/checkout/cart.php">
<operation>
<search><![CDATA[
'model' => $product['model'],
]]></search>
<add position="after"><![CDATA[
'sku' => $product['sku'],
]]></add>
</operation>
</file>
<file path="catalog/controller/checkout/simplecheckout*.php">
<operation>
<search><![CDATA[
'model' => $product['model'],
]]></search>
<add position="after"><![CDATA[
'sku' => $product['sku'],
]]></add>
</operation>
</file>
</modification>
думаю разберетесь каков принцип, подгоните под себя, в шаблоне уже ручками