You will need to change the padding and margins in your style.css here is my exaple:
/* base : layout columns
/* ———————————— */
/* 2 column, content left */
.col-2cl .main-inner { background: url(img/sidebar/s-right-s1.png) repeat-y right 0; padding-right: 200px; }
.col-2cl .s1 { float: right; margin-right: -200px; }
.col-2cl .content { float: left; }
/* 2 column, content right */
.col-2cr .main-inner { background: #ffffff; padding-left: 200px; }
.col-2cr .s1 { float: left; margin-left: -200px; }
.col-2cr .content { float: right; }
/* 3 column, content middle */
.col-3cm .main { background: url(img/sidebar/s-right-s1.png) repeat-y right 0; }
.col-3cm .main-inner { background: url(img/sidebar/s-right-s2.png) repeat-y left 0; padding-left: 200px; padding-right: 280px; }
.col-3cm .s1 { float: left; margin-left: -200px; }
.col-3cm .s2 { float: right; margin-right: -280px; /* ingenuity! */ position: relative; right: -100%; }
.col-3cm .content { float: right; }
/* news1 */
.news1 {padding:0px; margin:0px; }
.news1 { margin-bottom:10px; }
.news1 { display:none !important; }
.news1 { text-align:center; }
.news1 { font-size: 22px; color: #fff; padding: 5px 0; }
}
/* 3 column, content left */
.col-3cl .main { background-image: none; }
.col-3cl .main-inner { background: #f8f8f8; padding-right: 600px; }
.col-3cl .s1 { float: right; margin-right: -600px; }
.col-3cl .s2 { float: right; margin-right: -280px; }
.col-3cl .content { float: left; }
/* 3 column, content right */
.col-3cr .main { background-image: none; }
.col-3cr .main-inner { background: url(img/sidebar/s-left-dual-full-expand.png) repeat-y left 0; padding-left: 600px; }
.col-3cr .s1 { float: left; margin-left: -600px; }
.col-3cr .s2 { float: left; margin-left: -280px; }
.col-3cr .content { float: right; }