Weird...after upgrading from 2K, I've had no problems with ZA in XP Corp, or RC2 (the first version it was supposedly disabled in). Also, got it to work from a clean install, but I had to run the install in 2000 compatibility mode...still worked fine after install with no other caveats.

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"Black in the Sun
What have I done?
I feel so bad
I feel so numb"

Rob Zombie - "Feel So Numb"