1. Installation:
* Upload css_rating_sql.php and rating.php to your Textpattern directory. (You can skip this see 2)
* Upload 2 images in images folder to images directory.
* Upload the rpc.php to root directory (it handles ajax requests)
* Go to css_rating_sql.php e.g. http://www.yoursite.com/textpattern/css_rating_sql.php
* Delete css_rating_sql.php you get the success message
* Install css_rating
* Upload the rating.js file in files folder via Textpattern interface or directly to files folder.

2. Creating Rating SQL table (Optional, skip this if you do 1. step)
Following table is used for rating data you can run this sql code via phpMyAdmin

CREATE TABLE IF NOT EXISTS `txp_ratings` (
  `id` int(10) unsigned NOT NULL,
  `total_votes` int(10) unsigned NOT NULL,
  `total_value` int(10) unsigned NOT NULL,
  `used_ips` longtext NOT NULL,
  PRIMARY KEY  (`id`)
) TYPE=MyISAM;