You Mean Like This:
http://forum.x-cart.com/attachment.php?attachmentid=1807&stc=1&d=126323119 3
/* page container */
#page-container {
min-height: 100%;
position: relative;
width:960px;
margin:0 auto;
}
/* page layout */
#content-container {
clear: both;
float: left;
overflow: hidden;
position: relative;
width: 960px;
padding-bottom: 39px;
margin-top: 140px;
background-color: #ffffff;
border-left: 1px solid #E8E8E8; border-right: 1px solid #E8E8E8;
}
#header {
height: 140px;
position: absolute !important;
top: 0px;
left: 0px;
width: 960px;
border-left: 1px solid #E8E8E8; border-right: 1px solid #E8E8E8;
background:#FFF;
}
#footer {
height: 39px;
width: 960px;
position: absolute !important;
bottom: 0;
overflow: hidden;
float: left;
}
also:
altskin.css
#page-container {
border: 0px none;
margin: 0px auto;
text-align: left;
width: 960px;
float: none;
}
I have main above is set 960 change that to your needs and everything centred.