Register with Facebook Button

I’ve been looking everywhere and have checked out countless of plugins but none of them give me what I’m looking for; a ‘sign in’ or ‘register’ or ‘connect’ etc facebook button for our membership page.

The closest plugin was WP-FB-Autoconnect but it’s a widget – the options to just place shortcode for the button are too complicated for my knowledge. So basically I just want the button in an uncomplicated way.

Here’s an example of what I’m looking for:

http://www.wisie.com/membership-registration.php

Any experienced wordpresser’s advice most appreciated!!