OK, here’s some background info:
Every time you create a page or post, WordPress assigns a unique, numeric ID to it called the Post ID. You can see what the Post ID is by going to the page editor and editing a specific page. If you were to edit the About Lin page, for example, up in the address bar you should see a portion of the address that looks like post=313.
For properly developed themes, the Post ID is also assigned to different web elements on the page, either via a class name or an ID. If you view the source of the About Lin page using your browser, you’ll see that the <body> tag has a class of page-id-313.
What this means is you can target CSS to act only on the elements of a specific page by adding whatever class or ID is being used to the front of the selector. So let’s say you create a Landing page, and you see that it has an ID of 456. One of the containers which holds the main content area has an ID of content, so to set the background of that area, you would add these CSS rules:
body.page-id-456 #content {
background: transparent url(http://www.awakenedlives.com/images/background.jpg) no-repeat;
}
#post-456 {
background: transparent;
}
So you would change 456 to the Post ID of the page that you want as your Landing page.
The first rule sets background of the DIV with an ID of content, but only for the page which has an ID of 456. You should set the value for url to point to the image that you want to use as the background. Since the content container is 810px wide, you probably want to use an image that is at least that wide.
The second rule sets the background of a container that displays the post content which is located within the content container. It currently has its background property set to white, so you need this rule in order to make it transparent so that the background image of the content container shows through.