How to display author image in author.php?

I am using author.php to display some information about my authors. I know that I can only use below user data from database:

$curauth->user_aim;
$curauth->user_email;
$curauth->user_firstname;
$curauth->user_icq;
$curauth->user_lastname;
$curauth->user_level;
$curauth->user_login;
$curauth->user_msn;
$curauth->user_nickname;
$curauth->user_description;
$curauth->user_url;
$curauth->user_yim;

I’m using user_nickname; and user_description; to display author name and Bio, I also use a loop to show the list of author’s posts BUT how can I add author image??? In 2.7 you cannot provide any image for your users. Is there any turn-around in 2.7? I thought I can use gravatar but I was wrong, because you can use gravatar only in a LOOP and If I do so then I’ll have an avatar for every post of the author. I only need one photo before the author name at the top of the page. Here is my author page code:

<?php get_header(); ?>
<?php
global $wp_query;
$curauth = $wp_query->get_queried_object();
?>

<!–content–>
<div id=”content”>

<!–left-col–>
<div id=”left-col”>

<h2><?php echo $curauth->nickname; ?></h2>

<p><?php echo $curauth->description; ?></p>

<p>Website: user_url ?>” target=”_blank”><?php echo $curauth->user_url ?>
</p>

<!– Authors –>
<div class=”authors”>
<h2 class=”pdaauthors”>Posts by <?php echo $curauth->first_name ?>: (<?php the_author_posts(); ?>)</h2>
<?php query_posts($query_string.’&posts_per_page=-1′);
if (have_posts()) :
echo “

\n”;
while (have_posts()) : the_post(); ?>
• ” rel=”bookmark” title=”<?php the_title(); ?>” class=”author-posts”><?php the_title(); ?> <?php the_time(‘M d, Y’) ?> <?php comments_popup_link(”, ‘(1 Comment)’, ‘(% Comments)’); ?>

<?php endwhile;
echo “

\n”;
else: ?>
<p>< ?php _e(‘Sorry, no posts matched your criteria.’); ?></p>
<?php endif; ?>
</div>
<!–Authors end–>

</div>

<?php get_sidebar(); ?>
</div>
<!–content-end–>

</div>
<!–wrapper-end–>

<?php get_footer(); ?>