Help help

I have made my vbb private so therefore have set the user permmissions so that you need to be logged in before you can enter the forum, now what i want to do is to change the textin the login screen, wehere it says all about not registered been removed etc i just want to change it to say something like "This is a private forum you must be a registered member before you can enter, register here" Where is the option so i can change this or shall i just use an editor i have then reup the login i want to that page or is there a simple way to do it. thankyou

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