Widges in ein Theme einfügen?

<div id="sidebar">
                
        <ul>
    <!-- Author information is disabled per default. Uncomment and fill in your details if you want to use it.
            <li><h2>Author</h2>
            <p>A little something about you, the author. Nothing lengthy, just an overview.</p>
            </li>
            -->


<li>
                <?php include (TEMPLATEPATH . '/searchform.php'); ?>
            </li>


<li><h2>Anmelden um Artikel zu schreiben</h2>
                <ul>
                    <?php wp_register(); ?>
                    <li><?php wp_loginout(); ?></li>
                    
                    <?php wp_meta(); ?>
                </ul>
                </li>
            


            <li><h2>Kategorien</h2>
                <ul>
                <?php wp_list_cats('sort_column=name&optioncount=1&hierarchical=0'); ?> 
                
            </ul></li>


            <?php /* If this is the frontpage */ if ( is_home() || is_page() ) { ?>                
                <?php get_links_list(); ?>
                
    <li><h2>Archiv</h2>
                <ul>
                <?php wp_get_archives('type=monthly'); ?>
                </ul>
            </li>
                
            <?php } ?>


            


        </ul>
        
        <br />
        <div class="info">
                <?php /* If this is a 404 page */ if (is_404()) { ?>
                
                <?php /* If this is a category archive */ } elseif (is_category()) { ?>
                <p>You are currently browsing the archives for the <?php single_cat_title(''); ?> category.</p>
                
                <?php /* If this is a yearly archive */ } elseif (is_day()) { ?>
                <p>You are currently browsing the <a href="<?php echo get_settings('siteurl'); ?>"><?php echo bloginfo('name'); ?></a> weblog archives
                for the day <?php the_time('l, F jS, Y'); ?>.</p>
                
                <?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
                <p>You are currently browsing the <a href="<?php echo get_settings('siteurl'); ?>"><?php echo bloginfo('name'); ?></a> weblog archives
                for <?php the_time('F, Y'); ?>.</p>
    
                  <?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
                <p>You are currently browsing the <a href="<?php echo get_settings('siteurl'); ?>"><?php echo bloginfo('name'); ?></a> weblog archives
                for the year <?php the_time('Y'); ?>.</p>
                
                 <?php /* If this is a monthly archive */ } elseif (is_search()) { ?>
                <p>You have searched the <a href="<?php echo get_settings('siteurl'); ?>"><?php echo bloginfo('name'); ?></a> weblog archives
                for <strong>'<?php echo wp_specialchars($s); ?>'</strong>.</p>
    
                <?php /* If this is a monthly archive */ } elseif (isset($_GET['paged']) && !empty($_GET['paged'])) { ?>
                <p>You are currently browsing the <a href="<?php echo get_settings('siteurl'); ?>"><?php echo bloginfo('name'); ?></a> weblog archives.</p>
    
                <?php } ?>        
        </div>        
        <br />
        <div class="navigation">
            <?php previous_post_link('&laquo; %link') ?><br />
            <?php next_post_link('%link &raquo;') ?>
        </div>    
        
    </div>