Grab the Physics Thesis Template (zip file); read the ReadMeFirst.pdf contained therein.
tex4ht is the key :)
Export to HTML (NOT HTML (Word))
Open converted html document in Word
Save as a .doc file
Do special stuff if there are any graphics files linked in the document (must be saved into the document itself) - see the ReadMeFirst.pdf instructions.
Suggested alternative: http://www.zamzar.com/ to convert online (result emailed to you) - less secure of course - don't send your top-secret stuff thru this :)