What repos and commands do I add to software sources in Debian Squeeze, so I may install the Aurora 8.0.1 browser using Debian Software Center or Synaptic? And what GPG public keys would I import and how?

I want to add the right repos, switches and keys so I can use Synaptic or Software Center to install the Aurora v8.0.1 browser on Debian Squeeze. ( http://www.mozilla.org/en-US/firefox/channel/ ) What repos and commands/switches do I add to software sources in Debian Squeeze, so I may install the Aurora browser using Debian Software Center or Synaptic? And what GPG public keys would I import and how?