Magento add sku or product number to shopping cart item in the checkout page

It is not difficult in Magento to add a sku, product number or any other product attribute to the shopping cart item on the checkout page. On our e-commerce website, http://www.paardcare.nl , our wish was to add the Sku number to the shopping cart. This can be done using:

$this->getChildProduct()->getAttribute();

The following file must be edited:

\app\design\frontend\default\default\template\checkout\cart\item\default.phtml

Around Line 36 place the this block:

<span style="color: #AAAAAA; font-weight: normal; font-style: italic;">- Art.

<?php

    if(is_object($this->getChildProduct())): 

        echo $this->getChildProduct()->getSku();

    else: 

        echo $_item->getSku();

    endif; ?>

</span>

This will look like:

Our snipped within the default code