Kieron, first of all, I suggest that you create your own plugin and do not make changes in the core files, because when you update your site - all the changes you've made will be lost.
As for the login form - check out the /ow_system_plugins/base/classes/console_event_handler.php file to see how the 'Sign in' and 'Sign up' buttons are added into the console. You will need to develop your own custom Sign In component and add it into the console.