Ahhh an Acrobat Question
Just so happens I am an Acrobat ACE (Adobe Certified Expert)
pdfwriter does not add the form fields, nor does distiller, unless you created the original file in Word and distilled it using pdfmaker (A plugin that comes with Acrobat for Office MS products)
You need the full version of Acrobat to be able to add the form fields for you to fill out. There are a couple plugins that may let you do it in reader, but from what I have seen, they do not have the flexability that Acrobat has.
Want to send the pdf my way I would be happy to get it where you can fill it out onscreen.