Create a Header Widget area without messing with functions.php file.

I gave up on the gallery theme and switched to the network theme because it is easier to display all posts featured images on main blog front page. My question is how do I add a header widget area without needing to alter the main functions.php file.

The only way I could do it as of now is to remove the following code:

/* Register the widget columns */
function network_widgets_init() {
	global $themename, $shortname, $options, $options2, $options3, $bp_existed, $multi_site_on;
register_sidebar(
	array(
		'name'          => __( 'Footer', 'network' ),
		'id'            => 'footer-page',
		'description'   => 'Footer',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h4 class="widgettitle">',
        'after_title' => '</h4>'
	)
);
register_sidebar(
	array(
		'name'          => __( 'Sidebar Blog', 'network' ),
		'id'            => 'sidebar-blog',
		'description'   => 'Blog',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h4 class="widgettitle">',
        'after_title' => '</h4>'
	)
);
if($bp_existed == 'true') {
register_sidebar(
	array(
		'name'          => __( 'BuddyPress Pages', 'network' ),
		'id'            => 'sidebar-members',
		'description'   => 'BuddyPress pages',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h4 class="widgettitle">',
        'after_title' => '</h4>'
	)
);
}
}
add_action( 'widgets_init', 'network_widgets_init' );

and put it in the child functions.php file as such:

/* Register the widget columns */
function network_widgets_init() {
	global $themename, $shortname, $options, $options2, $options3, $bp_existed, $multi_site_on;
register_sidebar(
	array(
		'name'          => __( 'Header Widget', 'network' ),
		'id'            => 'home',
		'description'   => 'Header',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h4 class="widgettitle">',
        'after_title' => '</h4>'
	)
);
register_sidebar(
	array(
		'name'          => __( 'Footer', 'network' ),
		'id'            => 'footer-page',
		'description'   => 'Footer',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h4 class="widgettitle">',
        'after_title' => '</h4>'
	)
);
register_sidebar(
	array(
		'name'          => __( 'Sidebar Blog', 'network' ),
		'id'            => 'sidebar-blog',
		'description'   => 'Blog',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h4 class="widgettitle">',
        'after_title' => '</h4>'
	)
);
if($bp_existed == 'true') {
register_sidebar(
	array(
		'name'          => __( 'BuddyPress Pages', 'network' ),
		'id'            => 'sidebar-members',
		'description'   => 'BuddyPress pages',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h4 class="widgettitle">',
        'after_title' => '</h4>'
	)
);
}
}
add_action( 'widgets_init', 'network_widgets_init' );

See how I added the header widget code at the beginning? I then put the following call to the widget area in the home.php file as such:

<?php get_header() ?>
	<div id="content"><!-- start #content -->
		<div class="padder">

<!-- Begin of Header Widget Area -->
	<center><table style="width:750px"><tbody><tr><td><?php if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar('Header Widget') ) : ?>
	<?php endif; ?></td></tr></tbody></table></center>
       <!-- End Header Widget Area -->

	       <?php locate_template( array( '/library/components/feature-content.php' ), true ); ?>
       </div>
	</div><!-- end #content -->
<?php get_footer() ?>

The part I added is in between the <!-- Begin of Header Widget Area --> and <!-- End Header Widget Area --> It works just fine but I know on the next theme upgrade all will be lost and I'll have to do it again. Not a big deal but if I can prevent it I would like to know how I can have it only use the one in the child functions.php file and ignore the one in the parent functions.php file. Or if I have to change the above code how do I go about doing it?

Plus if the author can redesign the theme to include a header widget area that would be perfect.

The part I wouldn't know how to do is what would I change `function network_widgets_init() {
global $themename, $shortname, $options, $options2, $options3, $bp_existed, $multi_site_on;andadd_action( 'widgets_init', 'network_widgets_init' );` to?

Thanks for helping with all my questions.
John