Yes, all well known CMS on the web has been tested on our servers and many of our customers are already using them on their sites.
For the installation you just need to follow the instructions provided in the readme files or install files included in thoses scripts.
The main steps are as follows:
1- Download the latest version of the script (mambo, postnuke, php-nuke, xoops... )
2- Untar / Unzip into your local pc,
3- Upload files to the directory you want to locate the files, i.e, yoursite.com/site/
4- Create the database within your account CP by clicking in the "Database" TAb... , dont forget to add a user for that database :)
5- Edit the config file of the script or simply follow the install instruction-wizard (depending on the script you are installing)
i.e, this is a sample of a configuration.php in mambo:
***************************************
$mosConfig_editor = '';
$mosConfig_offline = '0';
$mosConfig_host = 'mysql.igosite.com';
$mosConfig_user = 'user_name';
$mosConfig_password = 'Pa55word5';
$mosConfig_db = 'database_name';
$mosConfig_dbprefix = 'mos_';
$mosConfig_lang = 'english';
$mosConfig_absolute_path = '/hsphere/local/home/useraccount/yoursite.com/mambo';
$mosConfig_live_site = '
http://www.yoursite.com/mambo';$mosConfig_sitename = 'yoursite.com';
***************************************
6- Finish.