The code for the submit news button is in header.php and looks like this:
<?php
// submit news button
if($k_option['contact']['membernews'] != 2) {
if(($k_option['contact']['membernews_who'] != 2 && current_user_can('level_0')) || $k_option['contact']['membernews_who'] == 2)
{
?>
<a id='submit_news' rel="prettyPhoto" class='ie6fix' href="<?php echo get_bloginfo('template_url'); ?>/submit_news.php?iframe=true&width=420&height=580"><?php _e($k_option['contact']['submit_news_text'],'newscast'); ?></a>
<?php
}
} ?>
If you wanted to add another one, add this code immediately after, changing text in CAPITALS:
<a id='LINK-ID' rel="prettyPhoto" class='ie6fix' href="<?php echo get_bloginfo('template_url'); ?>/PAGE-NAME.php?iframe=true&width=420&height=580">LINK TEXT</a>