Downloaded Beta 2, burned CD ... and lost key! Now what?

I spent almost a day downloading Vista beta 2 last month, found my old PC wasn't up to it, but now I've lost the key. I thought they would email a copy of the key to my email, but they didn't.

So...I have a DVD but no key. Have I wasted the time and bandwidth? Will it install and run at all? And for how long is the trial?
I know these might seem like FAQs, but I can't find the answers!

What I don't want to do is spend ages backing up my newer PC to clear it down, only to stick the Vista DVD in and be asked for the key!


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