Show certain Category on Front page

Hi all,

I am using a theme that shows all recent posts on the front page. I want it to show a certain category on the front page only.

Here is the code for the front page:

 <?php if (have_posts()) : while (have_posts()) : the_post();
  if( $post->ID == $do_not_duplicate ) continue; update_post_caches($posts); ?>

So where do I drop in the category changer.

Or do I use Advanced Category Excluder http://wordpress.org/extend/plugins/advanced-category-excluder/faq/?

Thanks!
George