This is a really, really weird problem.
After getting Blood 2: The Chosen to work, I decided to try and put in the Nightmare Levels add-on too.
The result was very strange.
Firstly, it made it that the movies from the movie pack don't work right anymore... not even when I set fpsmax to 30, which used to solve the problem.
What's more, all the game-engine cut-scenes have a strange problem: the visuals run just a bit too fast, so the voice acting can't catch up... you end up having people talking in such a way that they cut off someone before they finish talking.
The strangest thing is that this doesn't just happen in the Nightmare Levels... it also happens in the normal Blood 2: The Chosen games as well. This DIDN'T happen before I installed the Nightmare Levels... it only started happening after I installed them.
I can't remember which upload I used to download it, but I found it very strange indeed that this is happening... anyone have any idea what might be causing this? I couldn't find any reference to this problem on the Blood 2 site....