Ok, vediamo allora se ho capito:
codice:
html,body{margin: 0;padding: 0}
body{font: 76% Verdana,Arial,sans-serif}
h1,h2,h3{font-family: "Trebuchet MS",Arial,sans-serif;margin: 0}

[...]

/* @if lte IE 6 */ 
@if lte IE 6 {
div#container {
width: expression(document.body.clientWidth<=550 ? "550px" : "auto")}
div#content{height:1%}/*risolve il peekaboo bug e il 3 pixel jog*/ 
}

/* @media print */
@media print {
body{font: 12pt Arial,sans-serif}
h1,h2,h3{font-family: "Trebuchet MS",Arial,sans-serif}
h1{font-size: 160%}
h2{font-size: 140%}
h3{font-size: 120%}
p{line-height: 1.2}
div#header{border-bottom: 1px solid #000}
div#nav,div#extra, a#skipnav{display:none}
div#footer{border-top: 1px solid #000;font-size: 80%}
}
E poi faccio degli @import, giusto?