Hey Tolwyn and fellow WC fans!
I'm new here, wanted to say what a freakin' amazing achievement this WC Saga is! So glad that the WC universe lives on through the community!
I was having some real issues in trying to get the game to run really smoothly. I just bought a new rig: 2.4 Ghz C2D E4600, 2GB RAM, 8800GT 512MB. So I was doubting it was my hardware that was giving me much trouble. I tried every command line switch in the configuration menu. I took the resolution down, I took it up, but still I was getting these glitches in the framerate. It would be flying at either 60FPS or 120FPS (depending on vertical sync setting) and then as a cap ship would pass by my view it would drop from 120 to like 97, but there was a noticeable "pause" in the framerate as it adjusted itself. FINALLY, I tried running the game in Windows 95 compatibility mode as a last ditch effort out of frustration. PRESTO! It worked.
Hope you find this link instead of scouring the net like I did, and coming up empty!
Cheers!