I know, I know, 'm necro posting again... but this time, I have something that might help.
I tired running WZ2100 on a computer at work (I know, I know, I shouldn't be, but...).
I ran "the pit", and it worked fine.
Once again, when I ran the "Great Rift", the game crashed.
However, my work computer actually gave me the ability to save a memory dump file.
So here ya go. warzone2100.mdmp, saved at the time of the crash. I received roughly the same error message as I did at my home computer (a 0xc000005 memory access error, although my work computer's was at 0x004480e8, as opposed to my home computer's, which was at 0x0044811b).
I may have issues with my home computer, but I know the one at work is a very run-of-the-mill, maintained-by-certified-professionals type, so I no longer think this crashout is due to faulty settings on my CPU.
I hope this helps.
(Yes, I noticed that you are discontinuing the bug thread, but your post also states that if a thread was already here, I can append it. Hopefully, this will be the last time.)