Here is what worked for me. In style.css add the following: (at the top)
div#wrapper { position:relative; margin-left:auto; margin-right:auto; top: 0px; width:950px; /* set to required site width */ background-color: #ffffff; }In index.tpl add the red parts:
<body> [COLOR="red"]<div id="wrapper">[/COLOR] {if 'SKINS_PANEL'|defined} {include file="demo_skin_selector.tpl"} {/if} <a name="top"></a> {* http://blog.html.it/layoutgala/LayoutGala14.html *} <div class="header">{include file="top.tpl"}</div> {include file="main.tpl"} <div class="footer">{include file="bottom.tpl"}</div> {include file="common_templates/loading_box.tpl"} [COLOR="Red"]</div>[/COLOR] </body>