$a->config['system']['huburl'] = '[internal]';
// allowed themes (change this from admin panel after installation)
-$a->config['system']['allowed_themes'] = 'frio,quattro,vier,duepuntozero';
+$a->config['system']['allowed_themes'] = 'frio,vier';
// default system theme
$a->config['system']['theme'] = 'frio';