To install Ray read carefully the following text. 
Copy "ray" folder to your site root directory and run "http://[your_site]/ray/install/" to install the script.
This package contains the next elements:

1. “ray” folder contains the basic files necessary for Ray operation as a whole, and an installation interface for detached widgets. Copy the folder to the server, for example, to the public_html folder and run instalation wizard. following the next URL: http://www.your_domain.com/path_to_ray/install/index.php. Don’t forget to replace your_domain and path_to_ray with your site data. 

2. “license.txt” file - license agreement. You should thoroughly read it..

3. “readme.txt” file - this file.