diff --git a/load.php b/load.php
index 7233e11..327b50b 100644
--- a/load.php
+++ b/load.php
@@ -1,41 +1,150 @@
 <?php
 # Linux Day Torino - prepare the conference core
 # Copyright (C) 2016, 2017, 2018, 2019, 2020 Valerio Bozzolan, Linux Day Torino
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU Affero General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-// this file load the 'suckless-conference' framework
+/**
+ * This file loads the 'suckless-conference' framework.
+ *
+ * Note: you must call the 'suckless-php/load.php' before this.
+ */
 
-// note: you should have loaded the suckless-php framework before this
-
-// do not load if called directly
+// refuse to load directly
 if( !defined( 'ABSPATH' ) ) {
-	exit;
+	throw new Exception( 'Bad usage' );
 }
 
 // autoload any requested conference-related class
 spl_autoload_register( function( $c ) {
 
 	// this should be:
 	//   suckless-conference/includes/class-Test.php
 	$path = __DIR__ . "/includes/class-$c.php";
 	if( is_file( $path ) ) {
 		require $path;
 	}
 } );
 
+/*******************
+ * DEFAULT CONSTANTS
+ *******************
+ *
+ * You can override these constants declaring a:
+ *
+ *   define( 'SOMETHING', 'foo' );
+ *
+ * Just before loading this page.
+ */
+
+// default jQuery URL
+// as default it uses the jQuery installed in your distribution
+//   apt install libjs-jquery
+define_default( 'JQUERY_URL', '/javascript/jquery/jquery.min.js' );
+
+// default Leaflet URL
+// as default it uses the one installed in your distribution
+//   apt install libjs-leaflet
+define_default( 'LEAFLET_BASE_URL', '/javascript/leaflet' );
+
+// the markdown library
+// as default it uses the one installed in your distribution
+//   apt install php-markdown
+define_default( 'LIBMARKDOWN_PATH', '/usr/share/php/markdown.php' );
+
+// default admin URL
+// this can be a complete URL or whatever but without slash at the end
+define_default( 'ADMIN_URL', 'admin' );
+
+// timezone of database dates
+define_default( 'DEFAULT_TIMEZONE', 'Europe/Rome' );
+
+
+/********************
+ * SCRIPTS AND STYLES
+ ********************
+ *
+ * Scripts and styles that are often used in your CMSs.
+ */
+
+// register the jQuery library
+register_js( 'jquery', JQUERY_URL );
+
+// register the Leaflet library
+register_js(  'leaflet', LEAFLET_BASE_URL . '/leaflet.js'  );
+register_css( 'leaflet', LEAFLET_BASE_URL . '/leaflet.css' );
+
+
+/**********************
+ * ROLES AND PRIVILEGES
+ **********************
+ *
+ * Basic roles and privileges for your Conferences.
+ */
+
+// user permissions
+register_permissions( 'user', [
+
+	// an user is allowed to visit the backend
+	'backend',
+] );
+
+// translator permissions
+inherit_permissions( 'translator', 'user', [
+
+	// a translator can translate events
+	'translate',
+] );
+
+// admin permissions
+inherit_permissions( 'admin', 'translator', [
+
+	// an admin can add an event
+	'add-event',
+
+	// ad admin can edit an event even if not owned
+	'edit-events',
+
+	// an admin can edit all standard users
+	'edit-users',
+] );
+
+// superadmin permissions
+inherit_permissions( 'superadmin', 'admin', [
+
+	// can create a Conference
+	'add-conference',
+
+	// edit all Conferences
+	'edit-conferences',
+] );
+
+
+/***************
+ * PHP UTILITIES
+ ***************
+ *
+ * Some things that you should always setup.
+ */
+
+// apply the global timezone
+// above you will notice the constant definition
+date_default_timezone_set( DEFAULT_TIMEZONE );
+
+// that's all!
+
 // load some dummy conference-related shortcuts
 // this should be:
 //    suckless-conference/includes/functions.php
 require __DIR__ . '/includes/functions.php';