Tell you what. Do this. I am going to assume that one of your parent pages had the ID number of 7. If you don't have a parent page with ID 7, then where I refer to 7, use YOUR parent page ID.
1.Change to the WordPress Default theme.
2.Copy wp-content/themes/default/sidebar.php to wp-content/themes/default/sidebar-7.php.
3.In wp-content/themes/default/sidebar-7.php, change this code:
<?php wp_list_pages('title_li=<h2>Pages</h2>' ); ?>
to this:
<?php echo '!!!!This is sidebar-7.php calling!!!! '; ?>
<?php wp_list_pages('title_li=<h2>Pages</h2>' ); ?>
4. In wp-content/themes/default/pages.php, change this code:
<?php get_sidebar(); ?>
to this:
<?php
if ($post->post_parent) {
get_sidebar($post->post_parent);
} else {
get_sidebar();
}
?>
For your review:
Include_Tags
Page Templates