Magento switch to one column

gistfile1.xml

<!-- do this: -->

<catalog_category_default>
	<update handle="page_one_column" />
</catalog_category_default>



<!-- Also possible, but won't apply other settings that might be attached to the 1column layout (so don't do that...): -->

<catalog_category_default>
	<reference name="root">
		<action method="setTemplate"><template>page/1column.phtml</template></action>
	</reference>
</catalog_category_default>