Unfortunately that’s the only solution. You have to clone you sidebar.php (for example to sidebar2.php) and introduce it into your layout (index.php, archive.php, single.php etc.) using the <?php include (TEMPLATEPATH . '/sidebar2.php'); ?> syntax. Also you need to make some CSS work too. It’s not hard only have to pay attention to duplicate every aspect of the existing sidebar and after that to inser the new sidebar correctly in the mentioned php files.
Practically let’s trip down everything to this:
1) Clone your existing sidebar (the .php file and CSS classes)
2) Add the new sidebar using the above syntax.
You can make something like:
<div id="sidebar2">
<?php include (TEMPLATEPATH . '/sidebar.php'); ?>
</div>
… and add this to your index.php file and the other pages (archive.php, single.php etc.) practically everywhere where the sidebar should appear.
Also important thing to remember that you will need to make the “content” main holder (where the effective text/content appears) narrower to be able to add an extra sidebar (you need to respect a good aspect ratio).
Hopefully this will help you a bit but the tutorial you mentioned is very good so you should stick to it. If you have further problems just ask the WP community 🙂
Good luck!
With pleasure, you will be able to manage this thing out … Cheers!
