Hi Ian,
The IE6 conditional code calling for the ie6 stylesheet is pointing to the wrong place.
Try changing:
<!--[if lte IE 6]>
<link rel="stylesheet" type="text/css" media="all" href="../CSSMenuWriter/cssmw/menu_ie3.css" >
<![endif]-->
to:
<!--[if lte IE 6]>
<link rel="stylesheet" type="text/css" media="all" href="CSSMenuWriter/cssmw/menu_ie3.css" >
<![endif]-->