Thanks everyone. Here is another modification of the code using the FoldPages to list the parents and the siblings in separate menus (note that I have my css classes included here as well which you’ll need to modify).
<!-- level 2 menu begin -->
<div class="submenuwrap">
<ul class="submenu">
<?php
$g_page_id = $wp_query->get_queried_object_id();
$ancestorIDs = _wswwpx_page_get_ancestor_ids($g_page_id);
$titlePage = $ancestorIDs[1];
wp_list_pages("title_li=&child_of=".$titlePage."&depth=1");
?>
</ul>
</div>
<!-- level 2 menu end -->
<!-- level 3 menu begin -->
<?php
if($post->post_parent)
$children = wp_list_pages("title_li=&child_of=".$post->post_parent."&echo=0&sort_column=menu_order&sort_order=DESC");
else
$children = wp_list_pages("title_li=&child_of=".$post->ID."&echo=0&sort_column=menu_order&sort_order=DESC");
if ($children) { ?>
<div class="newslistwrap">
<ul class="newslist">
<h5 id="post-<?php the_ID(); ?>"><?php the_title(); ?></h5>
<?php echo $children; ?>
</ul>
</div>
<?php } ?>
<!-- level 3 menu end -->