Comments not correspond to current post

Hi, For design reasons, I had to call the comments.php outside of the loop. Problem is that the comments correspond to the latest post and not the current post. Obviously I need the comments to correspond with the current post.

On my post.php I have the Loop, after the loop I have this code:

<?php  $posts = get_posts('numberposts=4&offset=0&category=1');
        if ($posts) :
        foreach($posts as $post) :
        setup_postdata($post);
        ?>
          <div id="show_latest_posts">
          <a href="<?php the_permalink(); ?>">
          <img
            title="<?php the_title(); ?>"
            alt="<?php the_title(); ?>"
            src="<?php
            $customFields = get_post_custom();
            $thumbnail = $customFields['thumbnail'];
          if ($thumbnail) {
            print $thumbnail[0];
          } else {
            print bloginfo('stylesheet_directory')."/images/novideo.gif";
          }
          ?>" width="200" height="113" /><br /><?php the_title(); ?></a>
          </div>
        <?php endforeach; endif;?>

What this does is call a thumbnail for each of the last 4 posts, this is happening right after the loop, then I call the comments. Tried several ways, but it still shows comments from the last post and not the current one. And when I comment, comments go also to the latest post and not the current one.

Any advice?