OUTLOOK - using form when sending FROM a secondary/public profile

I have designed several forms as .oft files.  They are customizations of the
appointment base form.

These work well for people to request meetings from their personal profiles.  What I want to do is have peope request FROM a public/shared account.

New meeting requests default as from each individuals account.  There is no 'from' field as you can get on emails.  Same behavior is seen with custom forms based on appointments.

The only way I can get an appointment from the shared calendar is to highlight the time slot in the public calendar, right click, and request.  This works fine for a standard request, but does not allow me to use my custom form.

so.....is there a way to ues a form from a public folder. Perhaps with a script?  Any ideas will be much much appreciated.

Thanks,
Matt