WordPress MU

When i was using 1.3.3, i entered some RSS links into the dashboard area, other than the dev RSS and other wordpress news. With 1.5.1, i can not figure out how to enter in these new RSS feeds. Can someone set me right on this?
Old index-extra.php:

case 'devnews' :
$rss = @fetch_rss(apply_filters( 'dashboard_primary_feed', 'http://www.crosswalk.com/rss/' ));
if ( isset($rss->items) && 0 != count($rss->items) ) {
?>
<h3><?php echo apply_filters( 'dashboard_primary_title', __('Christian News') ); ?></h3>
<?php
$rss->items = array_slice($rss->items, 0, 3);
foreach ($rss->items as $item ) {
?>
<h4><a href='<?php echo wp_filter_kses($item['link']); ?>'><?php echo wp_specialchars($item['title']); ?></a> — <?php printf(__('%s ago'), human_time_diff(strtotime($item['pubdate'], time() ) ) ); ?></h4>
<p><?php echo $item['description']; ?></p>
<?php
	}
}
?>

<?php
break;

case 'planetnews' :
$rss = @fetch_rss(apply_filters( 'dashboard_secondary_feed', 'http://www.bpnews.net/BPNewsRSS.asp' ));
if ( isset($rss->items) && 0 != count($rss->items) ) {
?>
<h3><?php echo apply_filters( 'dashboard_secondary_title', __('Other Christian New') ); ?></h3>
<ul>
<?php
$rss->items = array_slice($rss->items, 0, 20);
foreach ($rss->items as $item ) {
$title = wp_specialchars($item['title']);
$author = preg_replace( '|(.+?):.+|s', '$1', $item['title'] );
$post = preg_replace( '|.+?:(.+)|s', '$1', $item['title'] );
?>
<li><a href='<?php echo wp_filter_kses($item['link']); ?>'><span class="post"><?php echo $post; ?></span><span class="hidden"> - </span><cite><?php echo $author; ?></cite></a></li>
<?php
	}
?>
</ul>
<p class="readmore"><a href="<?php echo apply_filters( 'dashboard_secondary_link', 'http://planet.wordpress.org/' ); ?>"><?php _e('Read more &raquo;'); ?></a></p>
<?php
}
break;
}

?>

New index-extra.php

case 'incominglinks' :
	wp_dashboard_incoming_links_output();
	break;

case 'devnews' :
	wp_dashboard_rss_output( 'dashboard_primary' );
	break;

case 'planetnews' :
	wp_dashboard_secondary_output();
	break;

case 'plugins' :
	wp_dashboard_plugins_output();
	break;

}

?>

You can edit dashboard.php in wp-admin/includes, but it'll only change the feed for brand new blogs. The defaults are slapped into the db as a dashboard widget option when the blog is created. An add_filter mu-plugin will change the defaults so no core files are edited, but it won't change the options already written to the db.
<?php
function default_link($link) {
$link = 'http://default.domain.org/';
return $link;
}
function default_feed($feed) {
$feed = 'http://default.domain.org/path/feed/';
return $feed;
}
function default_title($title) {
$title = 'Default Title';
return $title;
}
add_filter( 'dashboard_secondary_link', 'default_link' );
add_filter( 'dashboard_secondary_feed', 'default_feed' );
add_filter( 'dashboard_secondary_title', 'default_title' );
?>