...actually I do not need it too anymore!
In my case (if it can help others), one of the files I modified following instruction was the wrong one - my mistake!
When you do the changings to general.php, make sure is the one within admin/includes/functions/ and not the one within includes/functions/.
I would suggest anyone that asks a question and then they solve the problem themselves, to explain what they did (if they have the time, as we all are busy) in order to help others.