+// allowed themes (change this from admin panel after installation)
+
+$a->config['system']['allowed_themes'] = 'dispy,quattro,testbubble,vier,darkbubble,darkzero,duepuntozero,greenzero,purplezero,quattro-green,slackr,diabook,diabook-blue';
+
+// default system theme
+
+$a->config['system']['theme'] = 'duepuntozero';