How do you use scaling backgrounds for dragonfly CMS?

[kilgorer]

I was told to use css so i will post the contents of my css file:
FONT {FONT-FAMILY: Verdana,Helvetica; FONT-SIZE: 10px}
TD {FONT-FAMILY: Verdana,Helvetica; FONT-SIZE: 10px}
BODY {FONT-FAMILY: Verdana,Helvetica; FONT-SIZE: 10px}
P {FONT-FAMILY: Verdana,Helvetica; FONT-SIZE: 10px}
DIV {FONT-FAMILY: Verdana,Helvetica; FONT-SIZE: 10px}
INPUT {BORDER-TOP-COLOR: #5B6A81; BORDER-LEFT-COLOR: #5B6A81; BORDER-RIGHT-COLOR: #5B6A81; BORDER-BOTTOM-COLOR: #5B6A81; BORDER-TOP-WIDTH: 1px; BORDER-LEFT-WIDTH: 1px; FONT-SIZE: 10px; BORDER-BOTTOM-WIDTH: 1px; FONT-FAMILY: Verdana,Helvetica; BORDER-RIGHT-WIDTH: 1px}
TEXTAREA {BORDER-TOP-COLOR: #5B6A81; BORDER-LEFT-COLOR: #5B6A81; BORDER-RIGHT-COLOR: #5B6A81; BORDER-BOTTOM-COLOR: #5B6A81; BORDER-TOP-WIDTH: 1px; BORDER-LEFT-WIDTH: 1px; FONT-SIZE: 10px; BORDER-BOTTOM-WIDTH: 1px; FONT-FAMILY: Verdana,Helvetica; BORDER-RIGHT-WIDTH: 1px}
SELECT {BORDER-TOP-COLOR: #5B6A81; BORDER-LEFT-COLOR: #5B6A81; BORDER-RIGHT-COLOR: #5B6A81; BORDER-BOTTOM-COLOR: #5B6A81; BORDER-TOP-WIDTH: 1px; BORDER-LEFT-WIDTH: 1px; FONT-SIZE: 10px; BORDER-BOTTOM-WIDTH: 1px; FONT-FAMILY: Verdana,Helvetica; BORDER-RIGHT-WIDTH: 1px}
FORM {FONT-FAMILY: Verdana,Helvetica; FONT-SIZE: 10px}
A:link {BACKGROUND: none; COLOR: #FFFFFF; FONT-SIZE: 10px; FONT-FAMILY: Verdana, Helvetica; TEXT-DECORATION: none}
A:active {BACKGROUND: none; COLOR: #FFFFFF; FONT-SIZE: 10px; FONT-FAMILY: Verdana, Helvetica; TEXT-DECORATION: none}
A:visited {BACKGROUND: none; COLOR: #FFFFFF; FONT-SIZE: 10px; FONT-FAMILY: Verdana, Helvetica; TEXT-DECORATION: none}
A:hover {BACKGROUND: none; COLOR: #000000; FONT-SIZE: 10px; FONT-FAMILY: Verdana, Helvetica; TEXT-DECORATION: none}
.title {BACKGROUND: none; COLOR: #ffffff; FONT-SIZE: 14px; FONT-WEIGHT: bold; FONT-FAMILY: Verdana, Helvetica; TEXT-DECORATION: none}
.content {BACKGROUND: none; COLOR: #ffffff; FONT-SIZE: 10px; FONT-FAMILY: Verdana, Helvetica}
.block-title {BACKGROUND: none; COLOR: #ffffff; FONT-SIZE: 10px; FONT-FAMILY: Verdana, Helvetica}
.storytitle {BACKGROUND: none; COLOR: #ffffff; FONT-SIZE: 12px; FONT-WEIGHT: bold; FONT-FAMILY: Verdana, Helvetica; TEXT-DECORATION: none}
.storycat {BACKGROUND: none; COLOR: #ffffff; FONT-SIZE: 10px; FONT-WEIGHT: bold; FONT-FAMILY: Verdana, Helvetica; TEXT-DECORATION: underline}
.boxtitle {BACKGROUND: none; COLOR: #ffffff; FONT-SIZE: 10px; FONT-WEIGHT: bold; FONT-FAMILY: Verdana, Helvetica; TEXT-DECORATION: none}
.boxcontent {BACKGROUND: none; COLOR: #ffffff; FONT-SIZE: 10px; FONT-FAMILY: Verdana, Helvetica}
.option {BACKGROUND: none; COLOR: #ffffff; FONT-SIZE: 10px; FONT-WEIGHT: bold; FONT-FAMILY: Verdana, Helvetica; TEXT-DECORATION: none}
.tiny {BACKGROUND: none; COLOR: #ffffff; FONT-SIZE: 10px; FONT-WEIGHT: normal; FONT-FAMILY: Verdana, Helvetica; TEXT-DECORATION: none}

Please help! I got a pic that was taken by a 1900X1200 monitor and would like it to display regularly on everybodys monitor. The site is eqbadabing.com