Website Builder Script [Help Needed!]

Website Builder Script [Help Needed!] Guys i have a website builder script through which we can create many websites having subdomains on our main domain.
The problem is that it have a manual installation and that is quite weired!
Here is it's installation note:-
Installation Guide

*Please create a backup copy of your files now and keep them in a safe place so that you always have the originals to replace, should you make a change to the code that prevents the system from operating properly.

** Would you like us to install the script for you? We offer installation for $25 via Paypal.
Please email support@websitemakerscript.com and put INSTALL REQUEST in the subject to request our installation service. We will get right back with you requesting your hosting / ftp / database access.

1) Create a database with your hosting company and use file /sql.sql to create the data tables in the database. If you do not know how to do this (usually via phpmyadmin), please call your hosting support and ask them for instructions. This only takes about 1-3 minutes.

2) With an html editor, open config.php, located in the primary folder and input the data (lines 9-22) and 'save' your changes. If you already have your hosting company on the phone or live chat, go ahead and ask them for your website's direct path (could be something like /your/name/direct/path) - you'll need it on two lines of the config file.

3) Open /pages/add_site.php and change line 108 to your domain
( mywebsite.com/user/subdomain) - Click 'save.'

4) Open /assets/images/website-logo.jpg & /assets/images/website-login.jpg to customize your header by adding your own logo over the current one. The website-logo.jpg is the left side and website-login.jpg is the right.

5) Open /template/header.php and edit line 33 to your domain (yourdomain.com/user/username).

6) This step is going to setup your Paypal info so that you can earn automated money when people select to remove the branding (created with...) from their website.

Login to your paypal account. Click "Merchant Services" | "Buy Now Button" | Input "Item Name" - (example: Remove Branding $10) - Price: $10 | Click on Step 3 and where you see: Take customers to this URL when they finish checkout: Enter this: http://www.yourdomain.com/process.php?type=rm_branding | Click "Create Button" and you'll see a screen where code is visible. You will see the EMAIL tab... click that and select the code & copy.

Open /pages/edit_site.php and go to line 86. Paste over the current paypal code with your newly generated code. You're all set! Now you will earn money anytime your users opt to remove branding and you will do so automatically.

7) Find .htaccess and temporarily rename to htaccess.txt - Open in text editor and where you see domains, change the domain to your domain and save. Rename as .htaccess.

8) Go to folder in zip /templates/template_1/templates/ and open index.tpl, about_us.tpl, contact_us.tpl, faq.tpl, gallery.tpl, and testimonials.tpl and change the domain at the bottom right of each page to your domain and save.

9) Copy / Upload / FTP all files and folders over to your root domain (yourdomain.com)

Installation is complete!  | Go to yourdomain.com to see it in action.

and here its official site:-
http://www.websitemakerscript.com/
but no help is provided there
They are asking for 25$ to get the script installed by them!

If anyone can describe me how to install this then please reply asap.
Here is the download link of the script:-
http://www.mediafire.com/?cwdf857vvl426ga
so please try to run it.

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