Guess what? I've finally found it -- the script for downloading PDF files without any complicated coding. Although I'm not really sure whether it's 100% foolproof. What the heck! It works! All thanks to scooby who posted the script at the infinitemonkeys site.
Here's a copy of the script for you guys out there. Glad to share it with you.
<%@Language="VBScript"%>
<%
Option Explicit
Dim objStream
Dim strFilename
strFilename = Request.QueryString("FName")
Set objStream = Server.CreateObject("ADODB.Stream")
objStream.Type = 1
objStream.Open
objStream.loadFromFile(Server.MapPath(strFilename))
Response.ContentType = "application/unknown"
Response.addHeader "content-disposition", "attachment;filename=" & Chr(34) & strFilename & Chr(34)
Response.BinaryWrite objStream.Read
objStream.Close
Set objStream = Nothing
%>
Andrew.. thanks heaps for your help. Really appreciate it.