<custom_checkout_success translate="label">
        <label>One Page Checkout Success</label>
        <reference name="root">
            <action method="setTemplate"><template>page/1column.phtml</template></action>
        </reference>
        <reference name="content">
            <block type="checkout/onepage_success" name="checkout.success" template="checkout/success.phtml"/>
        </reference>
    </custom_checkout_success>