<?xml version="1.0"?>
<layout version="0.1.0">
    <default translate="label" module="page">
        <label>All Pages</label>
        <block type="page/html" name="root" output="toHtml" template="page/3columns.phtml">
            <block type="page/html_head" name="head" as="head">
                <action method="addCss"><stylesheet>css/styles-custom.css</stylesheet></action>
            </block>
        </block>
    </default>
</layout>