grid template CPT

<?php
/*
Template Name: Stock Art
*/
?>
<?php
/**
 * The template for displaying Archive pages.
 *
 * Used to display archive-type pages if nothing more specific matches a query.
 * For example, puts together date-based pages if no date.php file exists.
 *
 * Learn more: http://codex.wordpress.org/Template_Hierarchy
 *
 * @package WordPress
 * @subpackage Twenty_Ten
 * @since Twenty Ten 1.0
 */

get_header(); ?>

		<div id="container">
			<div id="content" role="main">




			<h1 class="entry-title" align="center">
Stock Illustration - Coghill Cartooning
			</h1>
<!-- thumbnail grid code grabbed here: http://return-true.com/2010/05/creating-a-post-thumbnail-grid-in-wordpress/ -->
<div id="gridContainer" align="center">
<?php
$c = 1; //init counter
$bpr = 3; //boxes per row
query_posts( $query_string . '&posts_per_page=21' );
if(have_posts()) :
    while(have_posts()) :
        the_post();
?>
            <div class="image-grid" id="post-<?php the_ID(); ?>">
                <div class="postImage">
                    <a href="<?php the_permalink(); ?>" title="Cartoon <?php echo get_post_meta( get_the_ID(), 'stock-art-name', true ); ?> clipart"><?php the_post_thumbnail('thumbnail'); ?></a>
                <h1 class="page-title"><a href="<?php the_permalink(); ?>" title="Cartoon <?php echo get_post_meta( get_the_ID(), 'stock-art-name', true ); ?> clipart "><?php echo get_post_meta( get_the_ID(), 'stock-art-name', true ); ?></a></h1>

                </div>
            </div>
<?php
if($c == $bpr) :
?>
<div class="clr"></div>
<?php
$c = 0;
endif;
?>
<?php
        $c++;
    endwhile;
endif;
?>
<div class="clr"></div>

<?php wp_pagenavi(); ?>
</div>
			</div><!-- #content -->
		</div><!-- #container -->

<?php get_sidebar(); ?>
<?php get_footer(); ?>