Programatically change from delegate to direct booking

Our organization has used Exchange 97 in the past and used a resource
manager as a delegate to book conference rooms. This has some
limitation but generally works ok. We are now moving to Exchange 2000
and would like to switch to direct booking. The issue has come up that
when a meeting was scheduled through the delegate resource manager and
then the organizer's client machine is switched to direct booking, the
organizer cannot make changes to the meeting because they do not have
permissions (Error message: "You marked "Conference room X" as a
resource. You cannot schedule a meeting with "Conference room X"
because you do not have the appropraite permissions for the
account...). It seems that since the meeting was orginally booked with
the conference room by the resource manager, the organizer cannot make
changes to the meeting directly. When you open the meeting booked by
the delegate on the calendar of the conference room there is a note at
the top saying that the meeting was accepted by the delegate whereas in
direct booking it says the meeting was accepted by the orgnaizer. My
task is to progromatically modify all meetings booked through the
delegate to behave like those booked through direct booking (organizer
can make changes). Right now I am using CDO and ADO to access the
Appointment objects and have looked through the properties but I am not
sure which ones (if any) control this process. Can anyone tell me if
this can be done in CDO or if there are any alternatives? We are using
Windows 2000 Advanced Server with SP 4 and Exchange 2000 with SP 3.
Thanks in advance.