Office XP reinstall

[John Doe]

I bought a used computer that has Windows 98 and Office XP on it.
I would like to scrub it and reload everything as it is kind of messed
up.

The only problem is that I don't have the product key for Office XP.
They gave me the cd's but not the original jewel case for the Office
cd. Is there any way of pulling the product key out of the application
before I scrub the system?

thanks in advance,

Mark