[BRotondi]

In your Readme some things are unclear:
STEP 3
Edit LocalSettings.php.
-> Do you mean the one on the wiki-root?

Add this line after DefaultSettings
-> do you mean after require_once( "includes/DefaultSettings.php" );?

Now, change/add this setting:
$wgGroupPermissions['*']['createaccount'] = false;
-> do you mean after require_once( "$IP/includes/AuthPlugin_vBSSO.php" );
STEP 4
Edit class_core.php
-> do you mean [vB]/includes/class_core.php

STEP 5
Import the product
-> do you mean ACP -> Addons&Plugins -> Addons -> Upload from your Computer

Edit the plugin "MMOG Wiki: Online Location Hack"
-> This I do not understand at all...

I'm new in Hacks, but perhaps not the only one, so perhaps also others are unsure on what to do...
But anyway 1001 Thanks for the Hack!!

Bruno