To get your FREE account go to: http://www.psychometrics.cam.ac.uk/page/386/options.htm
Check if you meet all the requirements above
Download source package of Concerto
Extract source somewhere in your server web documents directory
Edit /SETTINGS.php and enter all your server settings ( MySQL host, MySQL port, MySQL database name, MySQL user login, MySQL user password, full URL of your Concerto installation, Rscript executable path ( Windows users must also enter MySQL home directory path ), and timezone
Save /SETTINGS.php file
Run /setup - if this is the first time you run the application it will create the whole database structure
Follow the instruction on /setup page, if no problems are encountered you can click on the link at the bottom of the page to start using your Concerto installation, if you encounter some problems use the recommendation on screen to fix them.