Hi,

I did a search on web but couldn't really find anything, well anything explained in detail at least ..

How can I make .pdf file downloadable insted of it opening in web browser?

I know that I can rar it , bu I really want to make it downloadable unrared .

You'll need a server side solution for this,
try this link for a start
http://imar.spaanjaars.com/QuickDocId.aspx?quickdoc=189

Thanks, will give it a try!