is if you have some PDF creation software. The new version of Word (out soon) will have built-in PDF creation capabilities, but until you upgrade you'll need to obtain some software. The industry standard (and best) application is of course Adobe Acrobat, but that will set you back $299 for the standard version and unless you are going to be doing a great deal of work with PDFs it just isn't worth forking out that much.
For a lot less (£50) you can buy a superb PDF application called 'Jaws' which does exactly what you want it to do and does it brilliantly.
Take a look