If you want to get everything for certain (races, saves, etc. too), just copy the My Documents\My Games\GalCiv2, My Documents\My Games\GC2DarkAvatar, and My Documents\My Games\GC2TwilightArnor folders over to the new machine. Just make sure to delete the prefs.ini files from each folder to avoid any issues with running the new machine on the same video settings as the old.