Change "Log In" tab on main page to "Log In/Register"

Hello,
Very easy one,
How do I change "Log In" tab on main page, to "Log In/Register"
Thankyou!

/includes/languages/english/header.php and place the edited copy in
/includes/languages/english/your_template/header.php

define('HEADER_TITLE_LOGIN', 'Log In');

Change the text between the single quotes

Awesome thanks,
Now that I'm in there I see an option for "create account" already defined as a header field. Could you tell me where to turn it on?... :D

Create Account is actually part of the phpbb integration and not one that you can turn on in the cart side - you can change the login text to Create Account if you wish

kobra:

Create Account is actually part of the phpbb integration and not one that you can turn on in the cart side - you can change the login text to Create Account if you wish
Cool, I realised shortly after posting that create acc was probably used else where. Then realised that where I'd tried to rename Log In, in the past, was in the original file, so my custom template was over riding it with the same text.....Doh!
Thanks! Now its all good