Why not using a code like this:

[HTML]
{ font-family: Trebuchet MS, Arial;
cursor : default;
background:#000 000 url("Images/long-template.jpg");
background-repeat:no-repeat;
background-position: center;
background-attachment:scro ll;
height: 1228px;
margin-left: auto;
margin-right: auto;
}
[/HTML]

Just add the
[HTML]Margin-left:...