SpaceDog,
I agree with Adultwire...
The goal of having a completely redundant website in a second location cannot be solved simply by DNS configuration.
You'd most likely need to find a new DNS solution that will track the state of both hosts and return the IP of the host that's alive. F5 Systems has a product called 3DNS that will most likely do that. They are not cheap solutions.
http://www.f5.com/f5products/3dns/index.html
You'll need two of those... It's not the cheapest way to solve the problem, but it's a pretty damn good one.
Good luck.
-KC