Using 3 levels of get_pages and displaying everything on the Grandparent page

Hey everyone, I’m not a big php coder so I need to come here and ask this question.

Basically I’m using WP for my portfolio site, and all my projects have 3 levels. There is a Grandparent (Example: Webpage Design), a Parent which sort of acts like a category (Example: “Landing Page Designs”), and then a Grandchild page which acts as an information page about that project.

Now I’ve been told many times by my friend I should just uses posts to do all of this stuff but I would really like to stick to pages so I can separate my blog and my site content.

What I’m trying to do is create a template for the Grandparent page, which would be able to identify all of it’s Children, and output a formatted unordered list (which I could add classes to) of all it’s Grandchildren. Then break and redo that process for every Parent page.

Right now I can easily use get_pages to display thumbnails of all the grandchildren and children pages that have content. The problem is I have no way to identify just a parent and use it as say a H2, and then break the format for the next parent. Is there any sort of for statement I could use to accomplish this?

This is the code I use to get all the grandchildren how I want. (I have the line about count == 4 because I need to apply a different class to the fourth thumbnail for my layout. The counting only to 9 is not important.)

<ul class="thumblist">
			<?php

				$pages = get_pages('child_of='.$post->ID.'');
			;
				$count = 0;
				foreach($pages as $pagg)
				{
					$content = $pagg->post_content;
					if(!$content)
						continue;
					if($count >= 9)
						break;
					$count++;
				?>

					<li <?php if( $count == 4 ) { echo 'class="thumbodd"'; } ?>><a href="<?php echo get_page_link($pagg->ID) ?>"><img src="<?php echo get_post_meta($pagg->ID, 'thumb', true); ?>" alt="<?php echo $pagg->post_title ?>"/></a></li>

			<?php }	?>

		</ul>

Since I really don’t do PHP I really could use help with this. Thank you very much in advanced and I can answer any questions you have about trying to make this work. Thanks again!