for this design, the top menu should not be removed. To reduce the height of the header area (top module), you could adjust height property of these classes in template.css file:
#ja-headerwrap {template.css (line 703)
background:transparent url(../images/header-bg.gif) repeat-x scroll 0% 0%;
height:386px;
position:relative;
z-index:99;
}
#ja-header {template.css (line 710)
height:340px;
line-height:normal;
position:relative;
}
#ja-topslwrap {template.css (line 915)
bottom:3px;
height:244px;
left:0pt;
margin:0pt;
overflow:hidden;
padding:0pt;
position:absolute;
width:100%;
}