Editing guest message in PHPbb3

I searched the PHPbb3 forum but find no answer.

I have most of my forum restricted to registered members only, guests only see
"You do not have the required permissions to read topics within this forum."

What I want is to edit this message to add something like "Creating an account is free by clicking on the "register" link above."
Better yet would be to add a link to the registration page after that line, or even better would be to have the guest sent directly to the registration page instead of the above page.

Can anyone help?

TIA!

i think "You do not have the required permissions to read topics within this forum." is not for guest only .it is for anyone don't have a permissions file ,i didn't try what you are asking in my self .but in think it will be the part of code that is responsible for viewing a forum ,it must first check permission , if ok you can see the forum else it will show this massage
"You do not have the required permissions to read topics within this forum." .

What I need to know is what file do I have to edit?

dan filipi wrote:What I need to know is what file do I have to edit?

phpBB3\language\en\common.php

search for SORRY_AUTH_READ