Nice work, MH.
For anyone who needs to update DirectX drivers to run:
A pure port, I love it.

Great work and pioneering.
Some random notes from a quick run through:
1. Writes screenshots = yes
2. Brightness slider = no effect (original d3dquake does have this)
3. Video options = crashes it
4. ALT-TAB = crashes it (the original d3dquake has this problem)
I also noticed no z-fighting on e1m1.