Custom Fields on Appointments+ Plugin


I´m using Appointment+ plugin from wpmu.
All is working fine, but I need a special feature:

I need custom fields on it.

I use this plugin for tennis booking and I would like that when someone books the tennis court (1 registered member) can add the other players (and if they are members or not by a "dropdown"). It is just text, do not need to confirm is this person is member or not, or something, just text.

But the important thing is that I need to add this text information on the "Appointments Admin" cause the court controller should know who are the other people...

Is this possible with this plugin, I hope yes :slight_smile:
Really thanks!!!!