+$a->config['system']['allowed_themes'] = 'quattro,vier,duepuntozero';
+
+// default system theme
+
+$a->config['system']['theme'] = 'vier';
+
+
+// By default allow pseudonyms
+
+$a->config['system']['no_regfullname'] = true;
+
+//Deny public access to the local directory
+//$a->config['system']['block_local_dir'] = false;