Windows Vista is getting more and more common these days (ok, ok, I don't like it either that much yet) and I thought I just let you know that I had no problems using the Z Expansion Setup under WIndows Vista as well.
Just throw in your Z Expansion Kit CD and start the setup_zexp program. You can find it in the Downloads sections of the main site.
The game installed fine and I could play it right away after installation. The only thing I realized, but thet was the same under XP, is that the fort blow-up cut scenes run extremely slow. Since I was using an Asus G2S it is not a hardware issue

Share your Vista experiences in this thread.
Best regards,
Zod