Own sidebars for pages

Hi
On my blog there is two important pages and of course lots of posts.
Now I’m trying to find a way to show own sidebars for both of pages and still have own for posts.

On functions.php there is following lines.
<?php
// register widgetized sidebars
if (function_exists(‘register_sidebar’)) {
register_sidebar(array(‘name’ => ‘Left Sidebar’, ‘before_widget’ => ‘<div id=”%1$s” class=”%2$s”>’, ‘after_widget’ => ‘</div>’, ‘before_title’ => ‘<h4>’, ‘after_title’ => ‘</h4>’, ));
register_sidebar(array(‘name’ => ‘Right Sidebar’, ‘before_widget’ => ‘<div id=”%1$s” class=”%2$s”>’, ‘after_widget’ => ‘</div>’, ‘before_title’ => ‘<h4>’, ‘after_title’ => ‘</h4>’, ));
}

And on foother.php
footer.php
<?php get_sidebar(); ?>

And my sidebar.php includes
<div id=”sidebar”>
<div id=”sidebar-left”>
<h4><?php _e(‘Categories’); ?></h4>

<?php wp_list_cats(‘sort_column=name’); ?>

<?php endif; ?>
</div>

<div id=”sidebar-right”>
<?php if ( function_exists(‘dynamic_sidebar’) && dynamic_sidebar(2) ) : else : ?>
<h4><?php _e(‘Tags’); ?></h4>

<?php wp_tag_cloud(”); ?>

<?php endif; ?>
</div>

So I’m so happy if someone could say what should I do to show own sidebars for every pages?

I read this manual but unfortunately I didn’t understand.
http://codex.wordpress.org/Customizing_Your_Sidebar#New_way_of_adding_sidebars