Find your header.php file and replacewith this. I moved the navigation to below the banner.
<head profile="https://gmpg.org/xfn/11">
<meta http-equiv="Content-Type" content="<?php bloginfo('html_type'); ?>; charset=<?php bloginfo('charset'); ?>" />
<title><?php bloginfo('name'); ?> <?php if ( is_single() ) { ?> » <?php _e('Blog Archive','ml');?> <?php } ?> <?php wp_title(); ?></title>
<meta name="generator" content="WordPress <?php bloginfo('version'); ?>" /> <!-- leave this for stats -->
<meta name="keywords" content="<?php bloginfo('description'); ?>" />
<meta name="description" content="<?php bloginfo('description'); ?>" />
<link rel="stylesheet" href="<?php bloginfo('stylesheet_url'); ?>" type="text/css" media="screen" />
<link rel="alternate" type="application/rss+xml" title="<?php bloginfo('name'); ?> <?php _e('RSS Feed','ml');?>" href="<?php bloginfo('rss2_url'); ?>" />
<link rel="pingback" href="<?php bloginfo('pingback_url'); ?>" />
<?php
global $page_sort;
if(get_settings('mistylook_sortpages')!='')
{
$page_sort = 'sort_column='. get_settings('mistylook_sortpages');
}
global $pages_to_exclude;
if(get_settings('mistylook_excludepages')!='')
{
$pages_to_exclude = 'exclude='. get_settings('mistylook_excludepages');
}
?>
<?php wp_head(); ?>
</head>
<body id="section-index">
<div id="container">
<div id="header">
<h1><a href="<?php bloginfo('siteurl');?>/" title="<?php bloginfo('name');?>"><?php bloginfo('name');?></a></h1>
<p id="desc"><?php bloginfo('description');?></p>
</div><!-- end id:header -->
<div id="feedarea">
<dl>
<dt><strong><?php _e('Feed on','ml');?></strong></dt>
<dd><a href="<?php bloginfo('rss2_url'); ?>"><?php _e('Posts','ml');?></a></dd>
<dd><a href="<?php bloginfo('comments_rss2_url'); ?>"><?php _e('Comments','ml');?></a></dd>
</dl>
</div><!-- end id:feedarea -->
<div id="headerimage">
</div><!-- end id:headerimage -->
<div id="navigation">
<ul>
<li <?php if(is_home()){echo 'class="current_page_item"';}?>><a href="<?php bloginfo('siteurl'); ?>/" title="<?php _e('Home','ml');?>"><?php _e('Home','ml');?></a></li>
<?php wp_list_pages('title_li=&depth=1&'.$page_sort.'&'.$pages_to_exclude)?>
<li class="search"><form method="get" id="searchform" action="<?php bloginfo('home'); ?>"><input type="text" class="textbox" value="<?php echo wp_specialchars($s, 1); ?>" name="s" id="s" /><input type="submit" id="searchsubmit" value="<?php _e('Search','ml');?>" /></form></li>
</ul>
</div><!-- end id:navigation -->