I'm having a lot of issues with Civ 4 lately. I have a Dell XPS (Pentium 4 processor, 3.4Ghz, and 2MB RAM), Win XP (SP3), with an nvidia 8800 GTS card. The nvidia drivers are up to date (258.96) and both Civ 4 and Beyond the Sword are patched (to 1.74 and 3.19, respectively). I have the latest...