Unless the regulator also has Word 2002, she should be able to set the
colors to suit herself without using the macro. If she requested the macro
and installed it herself, then that's okay. If, after installing and running
the macro, she's still not seeing the desired colors in your document, then
there's something else going on. Either the file is losing something in
transmission (in which case you might try zipping it before sending), or she
hasn't followed instructions correctly. Instead of sending her the macro
yourself, you might have referred her to Greg's page and let her download it
herself (and perhaps that's what you did do). At this point, though, I think
you have made a good-faith effort, and if the regulator can't get the
desired effects, the problem is entirely on her machine.
This is what you have to get across to her. You might refer her to Shauna
Kelly's article at
http://www.shaunakelly.com/word/trackchanges/HowTrackChangesWorks.html.
Emphasize to her that the way markup is displayed on her computer is
entirely the result of her own settings, not anything that you put into the
document. Also, it makes a big difference whether you set specific colors
for *all* additions and deletions or choose "By Author," which will result
in different colors for each reviewer.