Expanding width of middle section

[kobra]

Like I stated there is only so much area but you can try changinf the value I have highlighted in your template stylesheet.css file to a larger value or a %

#mainWrapper {
	text-align: left;
	width: 842px;
	vertical-align: top;
	background-image: url(../images/mainwrapper_tile.jpg);
	background-repeat: repeat-y;
	background-position: center;
	}