Forcing a download

[concept0020]

I need to force the browse to download a file. I have been working with this:

header( "Content-type: application/force-download" );

However that is not allowing the user to save the file it just opens the file.

Anythoughts as to how to make sure the user has to save the file?

I tried it in opera and it opens the save file dialog box however in IE it just opens the file..

thanks

DE2

[concept0020]

Well i think i have got it... at least it works so far...

$filename = $file[$i]; // the name the file will have on client computer
$file_to_download = '/home/concept/www/uploads/'.$file[$i]; // the name the file has on the server (or an FTP or HTTP request)
    $user_agent = strtolower ($_SERVER["HTTP_USER_AGENT"]);
    header ("Content-Type: application/octet-stream"); 

if ((is_integer (strpos($user_agent, "msie"))) && (is_integer (strpos($user_agent, "win")))) {
  header("Content-Disposition: attachment; filename=$filename"); 
} else {
 // header( "Content-Disposition: attachment; filename="$filename);
}
header( "Content-Description: File Transfert");
@readfile($file_to_download);
$i++;
exit();

now i just need to figure out how to download more than one file...