need code help creating conditional archive template

I’m not a programmer but have picked up a small bit of stuff. I’m trying to create an archive template that shows only the clickable post title for a certain group of categories and for the rest, the thumbnail attachment, title, and excerpt (this is what it currently displays).

Is it best to create two separate archive templates and direct the template path based on categories, or to create 1 conditional archive template?

I tried both without complete success.

I used this code in archive.php:

<?php
 if ( have_posts() ) { the_post(); rewind_posts(); }
 if ( in_category(4,5,6,7,8,9,10,453,454,455,456,457,458,459,460) ) {
 include(TEMPLATEPATH . '/archivesexperts.php');
 } else {
 include(TEMPLATEPATH . '/archives.php');
 }
 ?>

but it doesn’t seem to be working. Can anyone tell me if they see any problems with this code?

I also tried using 1 conditional archive template as shown below:

<?php get_header(); ?>

<!-- BEGIN content -->
<div id="content">

	<!-- BEGIN recent posts -->
	<div class="span cbox arc">
	<?php if (have_posts()) : $count = 0; ?>
		<?php /* If this is a category archive */ if (is_category(4,5,6,7,8,9,10,453,454,455,456,457,458,459,460)) { ?>
		<h2><?php fs_lang("Archive for "); ?> <strong><?php single_cat_title(); ?></strong></h2>
		<?php } ?>
		<ul>
		<?php while (have_posts()) : the_post(); $count++; ?>
		<li<?php if ($count==1) echo ' class="first"'; ?>>
			<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
		</li>
		<?php endwhile; ?>
		</ul>
		<div class="postnav">
			<div class="l"><?php next_posts_link('&laquo; '.fs_lang('Older Entries', false)); ?></div>
			<div class="r"><?php previous_posts_link(fs_lang('Newer Entries', false).' &raquo;'); ?></div>
		</div>

	<?php elseif (have_posts()) : $count = 0; ?>
		<?php $post = $posts[0]; // Hack. Set $post so that the_date() works. ?>
		<?php /* If this is a category archive */ if (is_category()) { ?>
		<h2><?php fs_lang("Archive for "); ?> <strong><?php single_cat_title(); ?></strong></h2>
		<?php /* If this is a tag archive */ } elseif( is_tag() ) { ?>
		<h2><?php fs_lang("Posts Tagged "); ?> <strong><?php single_tag_title(); ?></strong></h2>
		<?php /* If this is a daily archive */ } elseif (is_day()) { ?>
		<h2><?php fs_lang("Archive for "); ?> <?php the_time('F jS, Y'); ?></h2>
		<?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
		<h2><?php fs_lang("Archive for "); ?> <?php the_time('F, Y'); ?></h2>
		<?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
		<h2><?php fs_lang("Archive for "); ?> <?php the_time('Y'); ?></h2>
		<?php /* If this is an author archive */ } elseif (is_author()) { ?>
		<h2><?php fs_lang("Author Archive"); ?> </h2>
		<?php /* If this is a paged archive */ } elseif (isset($_GET['paged']) && !empty($_GET['paged'])) { ?>
		<h2><?php fs_lang("Blog Archives"); ?></h2>
		<?php } ?>
		<ul>
		<?php while (have_posts()) : the_post(); $count++; ?>
		<li<?php if ($count==1) echo ' class="first"'; ?>>
			<a class="attachment" href="<?php the_permalink(); ?>"><?php fs_attachment_image($post->ID, 'thumbnail', 'alt="' . $post->post_title . '"'); ?></a>
			<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
			<p><?php echo fs_clean($post->post_excerpt); ?></p>
		</li>
		<?php endwhile; ?>
		</ul>
		<div class="postnav">
			<div class="l"><?php next_posts_link('&laquo; '.fs_lang('Older Entries', false)); ?></div>
			<div class="r"><?php previous_posts_link(fs_lang('Newer Entries', false).' &raquo;'); ?></div>
		</div>
	<?php else: ?>
		<h2><?php fs_lang("Not Found"); ?></h2>
		<p><?php fs_lang("You are searching for something that isn't here."); ?></p>
	<?php endif; ?>
	</div>
	<!-- END recent posts -->

</div>
<!-- END content -->

<?php get_sidebar(); get_footer(); ?>

but with the above code, I see these problems:
? ALL category archive pages missing “ARCHIVES FOR [CATEGORY NAME]” title
?? “If” categories are correctly showing post titles only but “Else if” categories are as well when they should be showing the image attachment and excerpt as well

Can someone tell me how to fix either of the above options to work properly?

THANK YOU!!