[netpants]

Ok this is what I did in vbulletin.css, and the changes it made are little to none.

body {
	width: 100%;
	min-width:{vb:stylevar doc_minWidth};
	max-width:{vb:stylevar doc_maxWidth};
	font-size:{vb:stylevar font.fontSize}px;
	color:{vb:stylevar body_color};
	line-height:{vb:stylevar line_height};
}

.body_wrapper {
	padding: {vb:stylevar body_padding};
	background: {vb:stylevar body_background};
	-moz-border-radius: {vb:stylevar border_radius};
	-webkit-border-radius: {vb:stylevar border_radius};
	border-radius: {vb:stylevar border_radius};
        width:960px;
        margin-left: 50%;
        margin-right: 50%;
        
}