you need to edit the style.ccs file

There's a block of CSS code that looks like this:

#header {
background: #73a0c5 url('img/kubrickheader.jpg') no-repeat bottom center;
}

You need to change the 'img/kubrickheader.jpg' to point to your new logo path...

yeah i already did that but my problem is my banner is either cut or out of the limited area.