you should follow this steps carefully and be sure doing it the right way.
downloading and extracting files and you will get a copy of ( marocms ) script containing these folders :
go to this path application/config/database.php file and start editing, then place your hostname, username, password and database as you see in picture.
congratulations, Now you got the script up and running
if you need a professional to install it for you for just $5, just contact us at email@example.com with your purchase no.