anyone know how to NOT have your app't time change?

[tphone]

I did several searches and didn't find this information.
I travel a lot and it's becoming inconvenient to have to manually adjust my appointments when I change my clock (via 'visiting') to a new time zone.
I usually enter my itinerary at home including my flight times. When I get to my destination and change my clock on the mogul, my flight times (and everything else) are off by the time zone change.
What I'm hoping for is a registry edit that will change this behavior.
I was talking to my wife about my upcoming flight at 12:30pm and she told me, no, your flight is at 9:30am.
Good thing she told me, I would have missed it. Working too many hours.
Anyone have a solution?