I run GalCiv2 on my Dell laptop, an Inspiron 5160 , with the GF 440Go chipset as well. Instead of using drivers from Dell, go to OmegaDrivers.net and grab their copy of the Nvidia driverset. It's really old too, but still a lot newer and a LOT better than the ones offered by Dell. They also use real Detonator driver sets, so they make your card perform much better. I can run GalCiv2 at 1280x1024 and still get really good framerate with these drivers, and I have full textures too.
Cheers!