Help! Link to download PDF (not open)

Hi, I am trying to setup a link for users to download a PDF from my site. Does anyone know if there is a way to force a download dialogue box, instead of having the PDF open in a new window. I’ve been using the GetURL to do this.

I have looked everywhere, and only found this:
http://www.informit.com/guides/content.asp?g=flash&seqNum=342

But when I try to do it, there are errors, and its way above me to fix. Any help is much appreciated.

PS - I’m trying to do this because for some very weird reason, when it opens now in the new window, Acrobat just crashes (no clue why, but it does on all computers – I’ve tested on 5). Thanks.