Then start the command line and navigate to your web root folder.
php composer.phar create-project -s dev rgies/symfony [my-project-folder]
Finish the composer install process an setup the application configuration.
!! Please note the gui web interface only works at localhost !!
First time you call the web interface it shows the create bundle form.
Please change the admin password at app/config/security.yml.
You can encrypt passwords at the GUI main page in the top right option menue.