568742 Fix Joomla Website bug (Want background image on main page)

Bought and installed a Joomla! template from MonsterTemplates. Template purchased was this one: [login to view URL] Uploaded it to my site and modified it via the back end and my limited css skills. My website: [login to view URL] You will notice that on the "Products", "About us" and "Contact us" pages a background image shows up. But on the main page, I cant figure out how to get a background image to show up. I need to have it fixed so that I can place an image on the main page (I know how to FTP files to the server etc..) *I do not want to have the same background image that is on the other pages, as the main page background image will have the company logo... so it need to reference another image, as long as I can access that image via FTP and I can UL my logo background image when fixed. ** You can have access to the Joomla! back end of the site and FTP Dl, read and write and UL access to the server (for modifying css and php files), BUT I cant give you shell access or mysql database access as the server is a Hipaa secured medical server. I would think this a simple fix for someone who does this regularly, but I am completely stumped.