Stop iCal being default calendar
How do I stop iCal being the default calendar that opens invites? For example, I get a calendar event from, say, an airline booking, I want it to go to my Google calendar, or Outlook, but oh no, iCal grabs it. Once it's in iCal, I can't add invitees (because it wasn't created in iCal), and I can't even forward it to the calendar I want it to be in. It's frustrating enough that I want to go back to a PC, or poke myself in the eye with a pointy stick.
MacBook Pro