<frontend>
    <layout>
        <updates>
            <expressdelivery>
                <file>expressdelivery.xml</file>
            </expressdelivery>
        </updates>
    </layout>
</frontend>

<?xml version="0.1.0">
<layout version="0.1.0">

    <checkout_cart_index>
         <reference name="checkout.cart">
              <block type="core/template" name="extra_block" template="link/to/your/template" />
         </reference>
    </checkout_cart_index>

</layout>

<?php echo $this->getChildHtml('extra_block'); ?>

<?php echo $this->getChildHtml('crosssell') ?>