Hide Arras Theme header image on pages

I’m running the Arras Theme 1.4.3.1 on a site and I wanted to display the 640×250 thumbnail image on each post/page, but hide it for certain content, in this case it was all my pages.

There is some PHP code you can add to two files which will allow you to set a special custom field on a post/page which will hide that header image.

• In Functions.php:
  

  Define( ARRAS_DONT_DISPLAY_THUMB, 'dontdisplaythumbinpost');

• In library/template.php, find the line
  

  if ($post) $id = $post->ID;

• Add the following code after that line:
  

  $dontdisplaythumbinpost = get_post_meta($post->ID, ARRAS_DONT_DISPLAY_THUMB, true);
  if ($dontdisplaythumbinpost) {
  return false;
  }