How to add another Loop to catagory page

Hi,

I would like to add a second loop to a catagory page template that shows posts from another catagory.

For example, if you had a ‘News’ catagory page listing all recent posts from that catagory, then down the right side of the page I would also like to have a loop displaying posts from a ‘Featured Article’ catagory.

I have tried before using the following code which works for creating 2 or more loops on the index page but doesn’t seem to work on any other template page:

(Code placed in addition to existing catagory loop code)

<?php global $query_string;
$posts = query_posts($query_string.'&posts_per_page=6&cat=6');

<?php if (have_posts()) : while (have_posts()) : the_post(); ?>

<?php post_class(); ?> id="post-<?php the_ID(); ?>">
		<h4><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h4>

<?php
  $excerpt = get_the_excerpt();
  echo string_limit_words($excerpt,12);
	echo " ...";
?>

<?php endwhile; ?>

<?php endif; ?>

<?php wp_reset_query();