With minor changes, the code can process footnotes instead. Nonetheless, footnotes will be inserted at the end of the document - programatically inserting them at the foot of each page is problematic, especially because Word uses the current printer driver to work out where the automatic page breaks should occur. Change printers and you could end up with page breaks occuring in a different position.
This is not a problem, all the references will be at the end of the document.

Provided you convert the footnotes and endnotes separately, the fact they're interspersed within the document shouldn't matter. A limitation of the above macro, though, is that it doesn't handle the different numbering schemes that usually entails - for whichever references require it, you would need to do a bit of post-processing on the reference numbers to convert them to, say, roman numerals. The fact the macro preserves the corresponding Style names makes this fairly easy to do. An alternative is to change the footnotes to endnotes before running the macro, then process them all as a single set.
I intend to process both separately (then assign a different color to the reference marks in case the author haphazardly decides to use the same numbering style for both foot and endnotes, so I suspect that it won't be an issue.


Usually, you can only re-start on a Section by Section basis. Again, the macro could be modofied to process each Section independently and to put the notes at the end of the Section rather than at the end of the document.
I don't think this will be necessary, but I know exactly what you mean. If numbering is restarted, there is no way to easily discriminate once the notes are at the end of the document. I wonder if I can pre-pend a (Section X or Page X) to each reference...but I'm not worried about that.

What you might need to deal with, though, is footnote/endnote cross-references. I suggest dealing with those by converting them to plain text (eg by selecting them and pressing Ctrl-Shift-F9) before running the above macro.
I am not sure to what you are referring. The resultant text appears to be plain text, which should be sufficient.

There's a bit of tweaking I have to do, so I'm off to go testing. I'll be back in a little bit.

Thank you very much macropod, and everyone that offered a helping hand.