Go to squatty.com or something or download them from this site. Once you have them put the entire theme folder into your layout folder (also where it has professional). Now you should have a folder called whatever you want it to be (e.g. mytheme) . Go into your config.php, scroll down to where you see the "professional" part, and replace it with the folder of your theme. Reload the website and it should be fine.
Anyone can hold the helm when the sea is calm.