how to access a specific image sizing for an image field in CCTM:
add to functions:
add_image_size( 'contenttype-thumb', 216, 9999 ); // 216 is the width, set to whatever, 9999 is ignored (or swap to set height)
add_theme_support( 'post-thumbnails', array( 'contenttype' ) );
add to template page within loop:
<?php
global $post;
$fieldname = 'large_poster'; //the image field name
$image_id = get_post_meta($post->ID, $fieldname, true);
$images = wp_get_attachment_image_src( $image_id, 'contenttype-thumb', true);
echo $images[0];
?>
