ferdri3

worked it out. Added extra code to the extra div. For those who want to know:

style.css

#access_wr {
	position: absolute;
	top: 170px;
	margin: 0 auto;
	width: 940px;
}
#access {
	position: absolute;
	left: 0;
	display: block;
	float: left;
	margin: 0 auto;
	width: 470px;
}
#access2 {
	position: absolute;
	left: 470px;
	display: block;
	float: left;
	margin: 0 auto;
	width: 470px;
}

header.php

<div id="access_wr">
				<div id="access" role="navigation">
		  			<?php /*  Allow screen readers / text browsers to skip the navigation menu and get right to the good stuff */ ?>
					<div class="skip-link screen-reader-text"><a href="#content" title="<?php esc_attr_e( 'Skip to content', 'twentyten' ); ?>"><?php _e( 'Skip to content', 'twentyten' ); ?></a></div>
					<?php /* Our navigation menu.  If one isn't filled out, wp_nav_menu falls back to wp_page_menu.  The menu assiged to the primary position is the one used.  If none is assigned, the menu with the lowest ID is used.  */ ?>
					<?php wp_nav_menu( array( 'container_class' => 'menu-header', 'theme_location' => 'primary' ) ); ?>
				</div><!-- #access2 -->
				<div id="access2" role="navigation">
		  			<?php /*  Allow screen readers / text browsers to skip the navigation menu and get right to the good stuff */ ?>
					<div class="skip-link screen-reader-text"><a href="#content" title="<?php esc_attr_e( 'Skip to content', 'twentyten' ); ?>"><?php _e( 'Skip to content', 'twentyten' ); ?></a></div>
					<?php /* Our navigation menu.  If one isn't filled out, wp_nav_menu falls back to wp_page_menu.  The menu assiged to the primary position is the one used.  If none is assigned, the menu with the lowest ID is used.  */ ?>
					<?php wp_nav_menu( array( 'container_class' => 'menu-header', 'theme_location' => 'secondary' ) ); ?>
				</div><!-- #access2 -->
			</div>

functions.php

// This theme uses wp_nav_menu() in one location.
	register_nav_menus( array(
		'primary' => __( 'Primary Navigation', 'twentyten' ),
		'secondary' => __( 'Secondary Navigation', 'twentyten' ),
	) );

Thanks katmac!

no I used the same id for both.. but what you said could actually work!

Thanks, I am trying it now