how to force "save as" dialogue when clicking on the download link.

hi everyone and to zubrag

thankyou thankyou, this script looks good!
thankyou for all your efforts and sharing them with us ...

everything working ...
i have 2 needs (the second need is being able to use a remote server for the download files, so will discuss that in another thread)
QUESTION
how do i force "save as" dialog.
when in IE, the download immediately is downloaded by my download manager which opens and begins downloading, revealing the download URL.
cannot utilise your wonderful script until i can force"save as"

any clues for me?
thankyou for your time...
alto

PS it has something to do with putting something in the header of the downloads page. eg

i have ...
1 created a directory called "downloads"
2 uploaded a file called "mp3.zip" into the "download" directory
3 created page called "index.html"
4 placed the following text into the "index.html"

<html>
<head>
<title>Untitled</title>
</head>
<body>
<a href="http://myserver.com/downsmart/download.php?f=mp3.zip">mp3.zip</a>
</body>
</html>

----------------------------------------------------
these are some links which contain clues, though i do not know how to utilise the information, i am a newbie ...

thankyou for your time
alto

FORCE SAVE AS

http://www.usenet-forums.com/php-general/52620-open-save-dialog-link-working.html

http://www.boutell.com/newfaq/creating/forcedownload.html

http://www.actionscript.org/forums/showthread.php3?t=22107

http://www.ahfb2000.com/webmaster_help_desk/showthread.php?t=914

http://www.webmaster-talk.com/php-forum/18079-php-force-download-problem.html

MIME

http://en.wikipedia.org/wiki/MIME

http://www.iana.org/assignments/media-types/