You can't have an image that will scale itself without getting out of proportion, that is simply impossible. What if someone ajusts their screen to a nearly flat area? Your height will be much smaller and out of proportion than your width. Another thing is, if you have a screen resolution of 800x600, and you set up the background to be that size - when I view it with 1280x768, it will stretch into uglyness.

Nevertheless, you can set the image dimenstions to 100% by 100% rather than pixels.

Hope this helps.

-AInTeL