Category page in chronological order

Hi, I’m trying to format my category archives page so that it does two things: 1) display entries in chronological order with the oldest posts at the top of the page, and 2) display the full entry and not just the first few sentences. My archive.php file is below. Can someone please show me where and what to edit to accomplish what I want?

Thanks in advance,
Amir

—– X —–

<?php get_header(); ?>
<div id=”content”>
<?php if (have_posts()) : ?>
<?php $post = $posts[0]; // Hack. Set $post so that the_date() works. ?>
<?php /* If this is a category archive */ if (is_category()) { ?>
<h2 class=”pagetitle”>Archive for the ‘<?php echo single_cat_title(); ?>’ Category</h2>

<?php /* If this is a daily archive */ } elseif (is_day()) { ?>
<h2 class=”pagetitle”>Archive for <?php the_time(‘F jS, Y’); ?></h2>

<?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
<h2 class=”pagetitle”>Archive for <?php the_time(‘F, Y’); ?></h2>

<?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
<h2 class=”pagetitle”>Archive for <?php the_time(‘Y’); ?></h2>

<?php /* If this is a search */ } elseif (is_search()) { ?>
<h2 class=”pagetitle”>Search Results</h2>

<?php /* If this is an author archive */ } elseif (is_author()) { ?>
<h2 class=”pagetitle”>Author Archive</h2>

<?php /* If this is a paged archive */ } elseif (isset($_GET[‘paged’]) && !empty($_GET[‘paged’])) { ?>
<h2 class=”pagetitle”>Archivi</h2>

<?php } ?>

<p><?php posts_nav_link(‘ — ‘, __(‘« Previous Page’), __(‘Next Page »’)); ?></p>

<?php while (have_posts()) : the_post(); ?>
<h2>” rel=”bookmark” title=”Permanent Link to <?php the_title(); ?>”><?php the_title(); ?></h2>
<small><?php the_time(‘F jS, Y’) ?> <!– by <?php the_author() ?> –></small>
<p><?php the_excerpt() ?></p>

<?php endwhile; ?>

<p><?php posts_nav_link(‘ — ‘, __(‘« Previous Page’), __(‘Next Page »’)); ?></p>

<?php else : ?>

<h2 class=”center”>Not Found</h2>

<?php endif; ?>

</div>

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