image.xml

<?xml version="1.0"?>
<layout version="0.1.0">

	<anc_image_administrator_simpleowngallery>
		<reference name="content">
			<block type="anc_image/adminhtml_admingallery" name="simpleadmingallery" template="anc/image/simpleadmingallery.phtml" />
		</reference>		
	</anc_image_administrator_simpleowngallery>

</layout>