Use this code, don't forget to reload the skin in Global settings

//---------------------- "After Posts" CONTAINER EMBEDDED HERE ----------------------
	skin_container( NT_('After Posts'), array(
				'block_start'	=>	'<div class="AfterPosts">',
				'block_end'		=>	'</div>',
		) );			
// ------------------------- END OF "After Posts" CONTAINER -------------------------

Thanks;
I add the code below in _body_footer.inc.php after <div id="footer">

		<?php
			// Display container and contents:
			skin_container( NT_('Page Bottom'), array(
					// The following params will be used as defaults for widgets included in this container:
					'block_start' => '<div class="$wi_class$">',
					'block_end' => '</div>',
					'block_display_title' => false,
					'list_start' => '<ul>',
					'list_end' => '</ul>',
					'item_start' => '<li>',
					'item_end' => '</li>',
				) );
		?>