First, you must export the page you want to convert to html. For example, if we want to export
http://wiki.opengarden.org/Deki_Wiki:
curl -b cookies.txt "http://wiki.opengarden.org/@api/deki/pages/=DekiWiki/export?format=html" > c:\dekiwiki.html
And the we will use vbscript to convert the html output to a word document:
Set Word = CreateObject("Word.Application")
Set Doc = Word.Documents.Open("c:\dekiwiki.html")
Doc.SaveAs "c:\dekiwiki.doc",wdFormatDocument
Word.Quit
I'm using Office 2007 and it works without problem, I suppose older Office version will work too.
This is just a quick hack, but maybe you can start with this...