Mega Menu Plugin

Hi Sakin, Just wanted to say great work with the theme. Loving it so far and learning how to customise it. I'm trying to add Mega Menu plugin to Catch Everest: http://www.gsa-asb.com.au but it's not working. I've tried to follow the directions below but it seems to break the site every time (fatal error with custom_header.php) I was wondering if you had any thoughts on this? Kind Regards, M