It may be totally irrelevent to your problem but I have found this useful:
http://support.microsoft.com/default.aspx?scid=kb;en-us;308421
Hi
I just recently did a fresh install of Windows xp. I do work related documents in Microsoft word and save these to a cd-rw so they can be updated as needed. I would use the save as feature and it always worked. Since I have re-installed, I can no longer do this. When I try to save from word to a cd it says invalid function and something about my not having access or premission for this folder. I am logged on as computer administrator though. Wordpad, paint, etc will let me save to the cd-rw, the only thing I have found that won't work is Word and that is the only program I really need to work. Any suggestions would be appreciated because I am at a loss. I took Microsoft Office off and re-installed it without any success.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic