When you run Project'Or RIA for the first time, you get the configuration screen.
Most of the parameters defined here can be set to default values.
What will mostly depend on your environment are the Database connection parameters.
You must define the pramareters to access the MySql Database, corresponding to your specific MySql installation :
Host : if your installation is local, then set it to 'localhost' or '127.0.0.1'
User : in most cases, default installation uses 'root' user, but it may be changed on mysql installation
Password : eitheir you set it manually on MySql install, or you can try 'root', 'mysql' or '' (leave blank).