>>>PDF is great as a write-only file format. <g>
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>>IIRC, PDF is actually a repackaged PostScript. Now if you have something that can unpack it (and my suggestion to use OpenOffice was wrong, I misread "save a PDF to Word" as "save to PDF or Word"), you got yourself a .ps (or .eps) file which may somehow be used.
>
>I am aware that there is an open source converter that will read .PS and convert to .PDF but I'm not sure .PS is a requirement for creating .PDF.

I think it's created on-the-fly while .pdf is created, in at least some of the PDF creators. GhostScript actually does exactly that, converts a .ps into a .pdf file, and somewhere in its documents I thing it does say that PDF is sort of a compiled .ps - but then it's been a couple of year since I played with that, so I'm not sure I could find that again.