<layout version="0.1.0">
<default>
    <reference name="root">
        <!-- set a new file customized for module footer.phtml -->
    <block type="page/html_footer" name="footer" as="footer" template="page/html/footer.phtml">
            <action method="setTemplate" ifconfig="customizefooter/options/custom_enable_cf">
                <template>customizefooter/footer.phtml</template>
            </action>
            </block>
    </reference>
</default>
</layout>