Is there a way to easily move appointments from one calendar to a sub-calendar?

Here's my problem. I have an existing resource calendar which I'd like to publish. I know you can't publish a "main" calendar but can sub-calendars.I've created a rule to accept new appointments and put them on the sub-calendar (which works well).

The issue is with existing appointments -- how can I move them to the sub-calendar so that I can see everything through the calendar publishing host?

BTW, I'm using GW Win32 client v8.0.1. Thanks for the help!