use the Cute PDF downloadable freeware:
http://www.cutepdf.com/Products/CutePDF/writer.asp
Here's how to use it:
1) install it to your hard drive
2) download all the relevant PDFs and save them on your hard drive
3) right click on the PDF you wish to fill out. Scroll down to the "Open With..." option, and choose CutePDF.
4) Fill in the PDF the way you normally would
5) When you wish to save, click the blue button at the top of the PDF that says something like "Save with CutePDF" (I forget the exact wording)
6) an alert will pop up that you can't save information in the PDF file. Click OK.
7) The alert was wrong; your stuff is now saved. Close the PDF and then re-open by using "Open With... Cute PDF" again. Everything you wrote will still be there!
There's one minor caveat. Since Cute PDF is freeware, all the pages you create with it will say "Created with Cute PDF" in small type on the bottom left hand corner of each page of your secondary. You can get rid of this by paying for the Pro verision of Cute PDF- but personally, I didn't worry about it and stuck with the free version.
Frogs