Insert new colum wordpress

Hi!

Have this site:
htp://www.kreactor.no

I am very new to wordpress, and need some help
to Create 3 colums insted of 2.

The header-text (Om creactor) ->1 colum
The header-text (Siste nyheter) -> 2 colum

What i want is to insert a new colum, between 1 colum and 2 colum

How do i do that ?

Include source for index.php and functions.php

************** Index.php ******************

<?php

    // calling the header.php
    get_header();

    // action hook for placing content above #container
    thematic_abovecontainer();
    



?>

		<div id="container">
	
			<?php thematic_abovecontent(); ?>
	
			<div id="content">

				<?php 
            	
            	// create the navigation above the content
            	thematic_navigation_above();
				
                // calling the widget area 'index-top'
            	get_sidebar('index-top');
				
            	// action hook for placing content above the index loop
            	thematic_above_indexloop();

            	// action hook creating the index loop
            	thematic_indexloop();
				
            	// action hook for placing content below the index loop
            	thematic_below_indexloop();
				
            	// calling the widget area 'index-bottom'
            	get_sidebar('index-bottom');
				
            	// create the navigation below the content
            	// thematic_navigation_below();
            	
            	?>
				
			</div><!-- #content -->
		
			<?php thematic_belowcontent(); ?> 
		
		</div><!-- #container -->

<?php 

    // action hook for placing content below #container
    thematic_belowcontainer();

    // calling the standard sidebar 
    thematic_sidebar();
   
    // calling footer.php
    get_footer();

?>


********************** Functions.php *************************

<?php

//
//  Custom Child Theme Functions
//

// I've included a "commented out" sample function below that'll add a home link to your menu
// More ideas can be found on "A Guide To Customizing The Thematic Theme Framework" 
// http://themeshaper.com/thematic-for-wordpress/guide-customizing-thematic-theme-framework/

// Adds a home link to your menu
// http://codex.wordpress.org/Template_Tags/wp_page_menu
//function childtheme_menu_args($args) {
//    $args = array(
//        'show_home' => 'Home',
//        'sort_column' => 'menu_order',
//        'menu_class' => 'menu',
//        'echo' => true
//    );
//	return $args;
//}
//add_filter('wp_page_menu_args','childtheme_menu_args');

// Unleash the power of Thematic's dynamic classes
// 
// define('THEMATIC_COMPATIBLE_BODY_CLASS', true);
// define('THEMATIC_COMPATIBLE_POST_CLASS', true);

// Unleash the power of Thematic's comment form
//
// define('THEMATIC_COMPATIBLE_COMMENT_FORM', true);

// Unleash the power of Thematic's feed link functions
//
// define('THEMATIC_COMPATIBLE_FEEDLINKS', true);



function curPageURL() {
 $pageURL = 'http';
 if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
 $pageURL .= "://";
 if ($_SERVER["SERVER_PORT"] != "80") {
  $pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
 } else {
  $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
 }
 return $pageURL;
}


function my_footer($thm_footertext) {
	$thm_footertext = 'Design, utvikling og publiseringsløsning levert av <a href="http://aie.no" target="_blank">Alt i ett reklamebyrå</a>';
	return $thm_footertext;
}
add_filter('thematic_footertext', 'my_footer');

/* Meny over header */
function remove_thematic_actions() {
    remove_action('thematic_header','thematic_access',9);
    remove_action('thematic_header','thematic_blogdescription',5);
    remove_action('thematic_header','thematic_blogtitle',3);
    
}
add_action('wp','remove_thematic_actions');

/* -Meny over header- */

function childtheme_favicon() { ?>
	<link rel="shortcut icon" href="<?php echo bloginfo('stylesheet_directory') ?>/images/favicon.png"/>
<?php }
add_action('wp_head', 'childtheme_favicon');

function accesstop() {
    echo '<div id="access-top">&nbsp;</div>';
}



function accessbottom() {
    echo '<div id="access-bottom">&nbsp;</div>';
}

function additional_header_content() {
?>


<a href="/"><img id="logo" alt="logo" src="<?php echo bloginfo('stylesheet_directory') ?>/images/logo.png" /></a>
<?php
}


function new_header() {

    remove_action('thematic_header','thematic_brandingopen',1);
    
    remove_action('thematic_header','thematic_access',9);
    
}
add_action('init', 'new_header');
add_action('thematic_header','accesstop',1);
add_action('thematic_header','thematic_access',2);
add_action('thematic_header','thematic_brandingopen',3);
add_action('thematic_header', 'additional_header_content', 4);
add_action('thematic_header','thematic_brandingclose',5);
add_action('thematic_header','accessbottom',6);



function topbar() {
echo '<div id="topbar_wrap"><div id="topbar">';
	include (TEMPLATEPATH . '/searchform.php');
echo '</div></div>';
}
add_action('thematic_before', 'topbar', 6);

function kreactor_search_form() {
	$search_form = "\n" . "\t";
	$search_form .= '<form id="searchform" method="get" action="' . get_bloginfo('home') .'"><div>';
	$search_form .= "\n" . "\t" . "\t". "\t";
	$search_form .= '<input type="text" value="Søk på kreactor.no" onfocus="if (this.value == \'Søk på kreactor.no\') {this.value = \'\';}" onblur="if (this.value == \'\') {this.value = \'Søk på kreactor.no\';}" name="s" id="s" size="50" tabindex="1" />';
	$search_form .= '<input id="searchsubmit" name="searchsubmit" type="submit" value="" tabindex="2" />';
	$search_form .= "\n" . "\t" . "\t";
	$search_form .= '</div></form>';

	return $search_form;
}
add_filter('thematic_search_form', 'kreactor_search_form');

function splashtop() {
if(is_front_page()){
    echo '<div id="splashtop"></div>';
}}
add_action('thematic_belowheader','splashtop');

function splash() {
if(is_front_page()){
   // echo '<div id="splash"><img width="940px" alt="Vi benytter virkemidler fra teatret til å bygge levende bedriftskulturer" src="wp-content/themes/kreActor/images/splash.jpg" /></div>';

    echo '<div id="splash" style="background-image: url(wp-content/themes/kreActor/images/splash.jpg); height:300px; width: 940px;" align="center"><br><br><br><br><h2>Våre visjoner</h2><br>.....<br>.....<br>.....</div>';
}}
add_action('thematic_belowheader','splash');

function splashbunnen() {
if(is_front_page()){
    echo '<div id="splashbunnen"></div>';
}}
add_action('thematic_belowheader','splashbunnen');

function referanser_func() {
	return lpbc('categories=9');
}
add_shortcode('referanser','referanser_func');

if ( function_exists('register_sidebar') )
	register_sidebar(array(
	'name' => 'underheadbar',
	'before_widget' => '<div class=\'slicer\'></div>',
	'after_widget' => '',
	'before_title' => '<h3>',
	'after_title' => '</h3>',
));

function underheadbokser() {
if(is_front_page()){

    

    echo '
    <div id="underheadbokser">';
echo '<span id="boks1"><h3>Hva vi tilbyr</h3>';
wp_nav_menu( array( 'menu' => 'hva_vi_tilbyr' ) );
echo '</span>';
    	
    	if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar("underheadbar") ) :

		endif; 
		
    	echo
    	'<div class="clear"></div>
    </div>';


}
}
add_action('thematic_belowheader','underheadbokser');

function cssfix() {
echo '<!--[if IE 6]>
<link rel="stylesheet" type="text/css" href="/kreactor/wp-content/themes/kreActor/ie6.css" />
<![endif]-->
';
}
add_action('wp_head','cssfix');

function maintop() {
    echo '<div id="main-top">&nbsp;</div>';
}
add_action('thematic_belowheader','maintop');


function mainbottom() {
    echo '<div id="main-bottom">&nbsp;</div>';
}
add_action('thematic_abovefooter','mainbottom');


?>

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