When making your own myspace layouts, how do you get the background

[Cannibal Emma]

picture to stretch out? When I say "stretch out" I mean become larger (without getting blurry).How do I edit the code to look like the ones in the link?Here are some examples of what I want.http://sunshinee.com/scenic_defaults.php

[lilluder]

it depends on where you make your layout, sometimes u cant fit to the page, but you can resize the image on lunapic.com then save that image then make the backround with that image