Dealing with large background images? Well, perhaps I have a nice solution for you:
Low broser resolution
High broser resolution
The trick is quite simple: It's just an absolute positioned image with css properties "width: 100%; height: 100%" and "z-index:-1" directly inserted after the body tag. Nothing more. The only thing you have to pay attention on is to insert the image directly after the body tag if you want to have a scaling body image.
width:100%; height:100%; position: absolute; z-index: -1; top: 0; left:0;
<img id="background" src="background.jpg"/>
I wanted to use this css trick on my new website for younicmedia (we're currently working on it) but I got new ideas. Have fun with it!