1. You'll need Mysql DB and SSH access to your server
2. Download install http://smartcj.com/freescripts.shtml
3. upload (install_scj.php) to the rott of your domain
4. Run install_scj.php in ssh (shell) (php install_scj.php)
5. That's all

Note: new intsall ( starting with update 48) also support command line options

php install_scj.php domain=... admin_email=... mysql_host=... mysql_user=... mysql_pass=... mysql_name=...