Overlay Outlook 2007 Calendars

If you keep track of several calendars, and I’ve seen people who track 9 calendars besides their own; it would be nice to see all the appointments merged into one calendar. Outlook 2007 can do this, in a manner similar to Google Calendar.
Here’s how:
Change to Calendar view
Select more than one calendar in the list.

All calendars are displayed side by side.

Point and click the teeny arrow next to one of the calendar tabs.

The calendars are overlaid one on top of another.
The calendar that is active (the one you clicked) displays visually highlighted appointments.

Click the teeny arrow icon again to display calendars side by side.