Well I just tried to get it run on Office XP. I was getting the error "The macro cannot be found or has been disabled because of your Macro security settings".

Tools->Macros->Security was set to high so I changed it to low. However, Word doesn't recognise this unless you close it and restart Word (it doesn't tell you this though). Once I closed and restarted Word it was all good. I verified the restart problem by setting security back to high and the macro worked fine until I restarted Word.

Correction: You must change the security settings before you open the word document. Aloso medium security is OK as long as you say "Enable Macros" when you open the file

I did NOT install the VB6 runtimes to get it to work on Office XP/Win2k