disable "open file" in download pop-up

From: sok_secure (sok_secure@yahoo.com)
Date: 02/06/02

From: sok_secure@yahoo.com (sok_secure)
Date: 6 Feb 2002 00:02:21 -0800

i need to provide a file for download to my users BUT i dont want them
to open it. The pop-up that appears for a file download offers both to
open the file or download it.
Any way, i cud disable the "open", so that they HAVE to download ??