Como centralizar?

[usher]

estou querendo centralizar um site, será que é no css?

/* Alpha PNG support for IE 
 ------------------------------ 
 \*/  

* html img/**/{
    filter:expression(  
    this.alphaxLoaded ? "" :  
    (  
    this.src.substr(this.src.length-4)==".png"  
    ?  
    (  
    (!this.complete)  
    ? "" :  
    this.runtimeStyle.filter=  
    ("progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+this.src+"')")+  
    (this.onbeforeprint="this.runtimeStyle.filter='';this.src='"+this.src+"'").substr(0,0)+  
    String(this.alphaxLoaded=true).substr(0,0)+  
    (this.src="images/layout/blank.png").substr(0,0)  
    )  
    :  
    this.runtimeStyle.filter=""  
    )  
    );  
}  

body {
    background-color: #1D1C58;
    background-image: url(../images/layout/body.background.jpg);
    background-repeat: repeat-x;
    padding-left: 60px;
    padding-right: 60px;
    padding-top:0px;
    background-position: 68px 0px;
    _background-position: 70px 0px;
    margin: 0px;
}
#MenuPrincipal{
    text-align: center;
    background-image:url(../images/layout/tabs.bg.jpg);
    background-repeat: repeat-x;
    height: 29px;
    _background-position: 0px 1px;
    width: 584px;
    }
.TextMenu, .TextMenu a:link, .TextMenu a:active, .TextMenu a:visited{
    font-family:Verdana, Arial, Helvetica, sans-serif;
    font-size:12px;
    vertical-align: text-top;
    color: #1B1C58;
    text-decoration: none;    
}
.TextMenu a:hover{
    font-family:Verdana, Arial, Helvetica, sans-serif;
    font-size:12px;
    vertical-align: text-top;
    color: #0066CC;
    text-decoration: none;    
}
a:link, a:active, a:visited{
    color:#0066CC;
    text-decoration: none;    
}
a:hover{
    color:#0066FF;
    text-decoration:underline;    
}
#MenuPrincipal img{
    vertical-align: middle;
}
#DivContent{
    ~~~´obackground-image:url(../images/layout/content.begin.jpg);
    background-repeat:no-repeat;
    width:840px;
    padding: 5px;
}
#BGContent{
    background-image:url(../images/layout/content.bg.jpg);
    background-repeat:repeat-x;
    background-color:#FFFFFF;
    width:860px;
    margin-bottom: 0px;
    padding-bottom: 0px;
}
#EndContent{
    background-image:url(../images/layout/content.ending.jpg);
    background-repeat:no-repeat;
    background-color:#FFFFFF;
    width:860px;
    height:22px;
}
#LeftBar{
    width: 450px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 12px;
    color: #1B1C58;
    text-align: justify;
    padding: 0 0 0 10px;
}
#RightBar{
    width: 390px;
}
.bordaBox {
    background: transparent; 
    width: 380px;
}  
.bordaBox .b1, 
.bordaBox .b2, 
.bordaBox .b3, 
.bordaBox .b4, 
.bordaBox .b1b, 
.bordaBox .b2b, 
.bordaBox .b3b, 
.bordaBox .b4b {
    display:block;
    overflow:hidden;
    font-size:1px;
}  
.bordaBox .b1,
.bordaBox .b2,
.bordaBox .b3,
.bordaBox .b1b,
.bordaBox .b2b,
.bordaBox .b3b {
    height:1px;
}  
.bordaBox .b2,
.bordaBox .b3,
.bordaBox .b4 {
    background:#DFE7F1; 
    border-left:1px solid #A9BFD8; 
    border-right:1px solid #A9BFD8;
}  
.bordaBox .b1 {
    margin:0 5px; 
    background:#A9BFD8;
} 
.bordaBox .b2 {
    margin:0 3px; 
    border-width:0 2px;
}  
.bordaBox .b3 {
    margin:0 2px;
}  
.bordaBox .b4 {
    height:2px; 
    margin:0 1px;
}  
.bordaBox
.conteudo {
    padding:4px;
    display:block; 
    background:#DFE7F1; 
    border-left:1px solid #A9BFD8; 
    border-right:1px solid #A9BFD8;
}
#Camera {
    position:absolute;
    left:672px;
    top:120px;
    width:242px;
    height:129px;
    z-index:1;
}
#Box {
    position:absolute;
    left:-136px;
    top:254px;
    width:380px;
    height:129px;
    z-index:1;
}
#PosCamera {
    padding-right:5px;
}
h1{
    font-family: Arial, Helvetica, sans-serif;
    font-size: 17px;
    font-weight: bold;
    color: #1B1C58;
}
.topicos{
    
    margin: 5px;
    vertical-align:middle;
}
.FotoIni{
    margin: 10px;
    float: right;
    vertical-align:middle;
}
#TextCamera{
    font-family: Arial, Helvetica, sans-serif;
    font-size: 12px;
    color: #1B1C58;
    text-align: justify;
}
.FotoIniBorder {
    margin: 10px;
    float: right;
    vertical-align:middle;
    border: 1px solid #9AB4D6;
    background-color: #FFFFFF;
    padding: 5px;
}
#TextFooter{
    font-family: Arial, Helvetica, sans-serif;
    font-size: 10px;
    color: #FFFFFF;
    text-align:center;
}
#Botoes {
    position:absolute;
    left:597px;
    top:0px;
    width:324px;
    height:42px;
    z-index:2;
}
#BotoesBG {
    position:absolute;
    left:597px;
    top:0px;
    width:324px;
    height:42px;
    z-index:2;
}
#Interno{
    font-family: Arial, Helvetica, sans-serif;
    font-size: 12px;
    color: #1B1C58;
    text-align: justify;
    padding: 0 10px 0 10px;
}
.FotoBorder {
    margin:0 5px 0 5px;
    border: 1px solid #9AB4D6;
    background-color: #FFFFFF;
    padding: 5px;
}
#Logo{
    width: 860px;
    height: 250px;
}
#Shadow {
    border-right-width: 2px;
    border-left-width: 2px;
    border-right-style: solid;
    border-left-style: solid;
    border-right-color: #BACBE0;
    border-left-color: #BACBE0;
    width: 860px;
    display: block;
    background-color: #FFFFFF;
}
.FotoIniLeft {

    margin: 10px;
    float: left;
    vertical-align:middle;
}

textarea { 
font:10px arial, helvetica, sans-serif;
color:#4283B7;
border:1px solid #4283B7;
}
.form {
    background-color: #FFFFFF;
    font: 10px arial, helvetica, sans-serif;
    color:#4283B7;
    border:1px solid #4280B3;
    width: 70%;
}
#ContatoLabel {
    width: 350px;
    text-align: right;
    display: block;
    line-height: 14px;
    padding-right: 5px;
}
#ContatoFields {
    display: block;
    float: left;
    width: 200px;
    clear: right;
}
.formButton {
    background-color: #FFFFFF;
    font: 10px arial, helvetica, sans-serif;
    color:#4283B7;
    border:1px solid #4280B3;
}

[DeeKilleer]

no Body.. usa

Leftmargin:50px; por exemplo, la no CSS