Adding WP-PostRatings to Thematic by creating a Child Template (WordPress)

As my previous post says, I wanted to add the WP-PostRatings plug-in to all posts in a Thematic theme. Later I found out that the recommended way of doing this is through WordPress Child themes.
So I read in this aricle the basics of how to create and customize a child template.
Basically the steps to include the plug-in are the following:

• You start with an untouched Thematic theme
• Go to wp-content/themes/thematic/
• Move the thematicsamplechildtheme folder one level up (to wp-content/themes/) and rename it by preference. You just created your new Child Theme.
• You may modify the template's name by editing the style.css file's first few lines.
• To add the previously installed WP-PostRatings plug-in to the theme, edit the functions.php file and add the following to the file's end. I copied the function from the parnet theme's content-extensions.php file.

post_type == 'page') {
         $postheader = thematic_postheader_posttitle();        
     } else {
         $postheader = thematic_postheader_posttitle() . thematic_postheader_postmeta();    
     }
     
     echo apply_filters( 'thematic_postheader', $postheader ); // Filter to override default post header
    if(function_exists('the_ratings')) { the_ratings(); } // This command will actually insert the ratings in each post.
}
?>

Enjoy your new theme and I wish you high ratings! :-)