Har fået et php script. Mangler guide til opsætning

Hey. Jeg har fået et script til noget livesupport. Her er den guide der fulgte med og jeg er ikke en ørn til sådan noget.
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Server requirements for Live Support
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1.) MySQL (version 3.23 or higher)
2.) MYSQL database
3.) PHP (version 4.2.3 or higher)
4.) ImageMagick (optional)


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Installation And Setup Instructions:
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#1 Extract the zip file containing the software.
#2 Create a new MySQL DB and run the file, livesupport.sql usng PHPMyAdmin
#3 Open the file, common.php and edit values:
#============== main variables ===============

  #== address of the site location (with "/" at the and): ==
 
  $hostname = "http://www.yourdomain.com/livesupport/";
 
  #== database params ==
  define("DATABASE_NAME","DB_name");
  define("DATABASE_USER","DB_user");
  define("DATABASE_PASSWORD","DB_password");
   
#=============================================
#4 Create a folder in your server and name it as "livesupport"
#5 Upload all files to the newly created folder
#6 To edit the layout of the site, go to the main folder and edit the HTML codes of the following files:
-footer.php
-header.php
-about.htm
-contact.htm
-privacy.htm
-terms.htm


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Running The Software:
=====================
Admin: http://yoursite.com/livesupport/admin (Default Username: admin, Password: admin)
Main Page: http://yoursite.com/livesupport
Member Signup: http://yoursite.com/livesupport/signup.php

Hvordan får jeg den til at virke? Nogle der kan komme med en meget ledt guide. Har ptøvet noget lig. før men det her ser helt uoverskueligt ud!