>> I'd imagine few users are still running NT4 workstations; they are typically power users who would have upgraded to W2K or XP long ago. <<

That might be what you imagine, but in fact there are lots of companies still running NT 4. Contrary to what Microsoft would have us believe, many companies don't run right out and buy the latest version any more. They have come to realize that the cost of upgrading is significant when training time and learning curves are factored in. And the track record for stability in new OS versions is less than stellar.

Mike