I noticed when I first started playing the game that some of the animations were excessivly fast. When I viewed the planets they would be rotating so fast they were just a blur. In the starship designer the ships would spin extremely fast, same happened when viewing the ship designs when choosing a race.
This seemed oddly familiar with a problem I encountered in the PC ports of the grand theft auto games. A solution on one of their forums was to start the game, alt-tab to the desktop, and then modify the processor affinity so that only 1 processor was associated with the game. I tried this with GalCivII, worked like a charm, all the animations returned to normal speed.
I am playing GalCivII on an AMD X2 3800+ with a 32 bit version of windows XP. I have updated the game to V1.0X, and my display drivers for my ATI X600 are fully up to date. I think there may be an issue playing your game on dual core PCs, something that would definately interfere with your goal of giving GalCivII maximum longevity. If you have any solution to this that doesn't involve an Alt-tab every time I boot the game, I'd really appreciate it.