Sign up with Bluehost or Log In to your BlueHost account. Go To BlueHost.com
From your Bluehost Control Panel:
Select "Install Scripts"
Select "One Click Installs"
Search for "ShopSite" and click on the install button. (NOTE: Mojo Marketplace will install a free ShopSite Pro Demo Store on your account)
Follow the prompts to install "ShopSite"..
Go Live, once you have your Pro demo store setup the way you want, you can upgrade to a live, paid version of ShopSite by clicking on "Utilities" then "Upgrade" in your ShopSite Pro demo store.