Unattended install

Hi,
I have a script which installs my lemp server and wordpress.
Multiuser is the only manual thing at the moment, so I’d like to automate it.
I have scripted the adding of
define('WP_ALLOW_MULTISITE', true);
Is there any way I can automate the “tools > add network” part? So that I can continue with configuring wp-config.php with:

define( 'MULTISITE', true );
define( 'SUBDOMAIN_INSTALL', true );
$base = '/';
define( 'DOMAIN_CURRENT_SITE', 'mydomain' );
define( 'PATH_CURRENT_SITE', '/' );
define( 'SITE_ID_CURRENT_SITE', 1 );
define( 'BLOG_ID_CURRENT_SITE', 1 );

Thanks in advance ??