these images are all backgrounds for the top of the page.
they are all 146px high and maximum 900px wide.
feel free to make your own and include them in the style sheet (blue.css).
you can use a repeating background image as the background (top_bg.png) this way the image can be smaller in width than 900px, saving bandwidth.

1. make your image
2. upload it into the tops folder
3. make your html page from the template.html or edit an existing html page
4. edit or check the body id
5. edit this corresponding id in the css stylesheet

eg : 
#home #top {
background: transparent url(../tops/top1.png) 50px 0 no-repeat;
}

the selector is for the homepage div with id top
the background is an image of kili that is 146px high and 419 wide
The png is positioned 50px from the left (it is smaller than 900px wide and uses the image top_bg as the background).