Header Navigation

I am using the andyblue theme and want to have only certain pages displayed across the header navigation. I am assuming that this code in the header.php file is where I need to change that.

<div id="navigation">
<li class="selected"><a href=<?php echo get_settings('home'); ?>>Home</a></li>
<?php wp_list_pages('sort_column=menu_order&depth=1&title_li='); ?>
</div>

Can I just manually enter the pages I want in the header nav? If so what is the proper syntax? Do I just copy exactly what was done for the home page? Any advice would be greatly appreciated. I don’t want to screw it up somehow. Thanks