Importing your existing calendar (from Bookeo, etc.) into your Google Calendar to sync with AppointmentCore:
In your Google Calendar view, click on the dropdown arrow beside your Bookeo staff calendar and click on Calendar Settings: http://screencast.com/t/bsqmOKWpN3o
Next, download your calendar to your desktop by clicking on the iCal icon in the "Calendar Address" setting: http://screencast.com/t/m8TtbuxEtAsz
Once you've done that, go back to your calendar and select the arrow beside "Other Calendars", and select "Import Calendar": http://screencast.com/t/hpvl2vtIavEv
Choose the downloaded calendar file from your desktop and then select which of your existing Google Calendars you would like your events to be published to: http://screencast.com/t/mEGqWWGWaqs
That's it! Your events will appear in your Google Calendar and will appear in your AppointmentCore app.