Okay, I have searched far and wide for a forum post relating to my specific problem here, and I have not been able to find one.
I'm running XP/SP3 on a "Boot Camped" MacBook Pro with Intel DualCore 2.16 Ghz processors, 2 GB of RAM, and an ATI Radeon X1600 with 256 MB of VRAM. I have a Civ4...