Front page category issues

i want to call only two categories to the main page but i want them to be separated. its hard to describe and the site isn’t live but i’ll try my best.

the first category has an id of 4 and the second is an id of 3.
the site needs to look something like this:
—————–

– Newest post from category 4 in full
– Just the title of the next post in cat 4
– Just the title of the next next post in cat 4
– Just the title of the next next next post in cat 4

– Newest post from category 3 in full
– Second newest post from category 3 in full
– Third newest post from category 3 in full
so on and so forth.

—————–

i have accomplished the first part of this (category 4 posts are showing correctly) by stylizing a front.php and setting it as the main page. (i am also using the ACE plugin the make sure only posts from category 4 show on the main page.)

<div id="container">

		<?php if (have_posts()) : ?>
<?php query_posts("showposts=1"); ?>
<?php while (have_posts()) : the_post(); ?>

			<div class="post" id="post-<?php the_ID(); ?>">

				<h2><a href="<?php the_permalink(); ?>" title="<?php the_title() ?>"><?php the_title(); ?></a></h2>

				<div class="entry">

					<?php the_content(); ?>

					<p class="postmetadata">
Posted on: <strong><?php the_time("l F dS Y") ?>, <?php the_time() ?></strong> and <?php _e('filed under'); ?> <strong><?php the_category(', ') ?></strong><br />
<?php comments_popup_link('No Comments »', '1 Comment »', '% Comments »'); ?> <?php edit_post_link('Edit', ' | ', ''); ?>
					</p>					

				</div>

			</div>

		<?php endwhile; ?>

			<div class="post"><h2>
<?php query_posts("showposts=15&amp;offset=1"); ?>
<?php while (have_posts()) : the_post(); ?>
			</h2>

				<h2><a href="<?php the_permalink(); ?>" title="<?php the_title() ?>"><?php the_title(); ?></a></h2>

		<?php endwhile; ?>

		<?php else : ?>

				<div class="post">
						<h2><?php_e('Not Found') ?></h2>
				</div>

		<?php endif; ?>

</div>

now i don’t know what to add to make my page call only posts from category 3 below the code of what i already have.

any help would be appreciated. hope that makes sense.