Event Templates constitute an easy way to preset meeting-specific agenda.
Because FreeBusy works intimately with your calendar, the easiest way to set up and manage event templates is using the familiar interface of your calendar.
Event Templates are nothing more than Free events with some additional schema FreeBusy can understand. As a result, you can create them as you would ordinarily create Free events on your calendar.
We recommend that you consider creating a separate calendar within your calendar account to keep and manage event templates. This way, event templates will be kept separate from your actual calendar appointments and won't clutter the week view (since you can select individual calendars to be shown in the week view).