Hi Peter,
I've never used Net Objects Fusion, so I don't know if you can edit the head tags, but if you can then one option (if bj's solution doesn't work) would be to create a separate media="print" CSS.
Code:
HTML:
<head>
...
<link rel="stylesheet" href="print.css" type="text/css" media="print" />
</head>
PRINT.CSS:
body {
width: 6.25in;
font-family: "times new roman", times, roman, serif;
font-size: 12pt;
}