Almost done!

1. Setup the database tables:

      For mysql:
        mysql -u root -p < /usr/share/webapps/roundcubemail/VERSION/sqlscripts/mysql/VERSION_create.sql DB_NAME

2. Edit the files: db.inc.php and main.inc.php in the config sub-directory of
the roundcubemail installation. In order to connect to the database you'll
need to change the following line in db.inc.php to look something like this:

$rcmail_config['db_dsnw'] = 'mysql://roundcube:roundcube@localhost/roundcube';

3. Try out your new roundcubemail installation by going to the appropriate
URL, depending on where you installed it to and how your web server is set up.