unregister_hook('register_account', 'addon/testdrive/testdrive.php', 'testdrive_register_account');
unregister_hook('cron', 'addon/testdrive/testdrive.php', 'testdrive_cron');
unregister_hook('enotify','addon/testdrive/testdrive.php', 'testdrive_enotify');
unregister_hook('register_account', 'addon/testdrive/testdrive.php', 'testdrive_register_account');
unregister_hook('cron', 'addon/testdrive/testdrive.php', 'testdrive_cron');
unregister_hook('enotify','addon/testdrive/testdrive.php', 'testdrive_enotify');