Wirelessly posted (8320 Titanium)
The only way I know to do it is to uncheck the exceptions under profiles when you change the profile. On my curve, when I set my wife a specific ringtone, it creates an exception in the 'advanced' view of the profiles. When you go into profiles, scroll all the way down, click advanced. In the next screen you should see all your profiles and any "exceptions" you have. The custom tone for my wife is automatically checked by default. When you switch to the meeting mode, just uncheck the exception for your wife and home numbers, and they won't ring through anymore.
Hopefully that was understandable...
to access older OS versions for 8700 and 8320 devices that I have saved