Hrm. I just downloaded this mod, and tried testing it on the Last Days mod. First I had a pretty big performance hit, and the game crashed with a "Out of Static vertex buffer memory" message. Then I lowered the graphics somewhat, and it's smooth sailing, but after everything from 10 to 30 seconds, i get the same message, and the game locks up.
I doubt it's my comp, as I've got an AMD Athlon 64 3500+ processor, 2048 DDR corsair ram and a Nvidia GeForce 7800 card.
Any suggestions? Any work-arounds that I've missed?
Edit: It seems to last a bit longer in vanilla, where a battle might last for as much as 60 seconds, before I get the same message.