to you MaddyBadger. Thanks for putting the effort forth. If you're interested, I've tried my hand at one of the Eldar ships here:[link="https://forums.galciv2.com/index.aspx?ForumID=162&AID=104951&p=11"]https://forums.galciv2.com/index.aspx?ForumID=162&AID=104951&p=11">Link
(post #534, If I knew enough about posting, I'd clean that mess up a bit.)
As for races, I believe you had the right of it. Space marine chapters, IG, Imperial fleet etc are all part of one big happy family called the Imperium or Imperium of Man. (Thats Mon-kiegh to us Eldar players) Along with that are Eldar, Orcs, Tau, Chaos (which includes more than just the rogue marine chapters), Tyranid, and Necrons. (Did I forget anyone?) Within each of those races are a host of small 'divisions' if you will. (Eldar/Dark Eldar/Harlequins, Tau have their castes, Chaos is comprised of a number of lords/legions, Tyranids have different hives, etc.) I'm not fully up on all the Fluf that they've created with their universe, so it's possible I'm missing something here. Other than the fact that I'm sure each and every player wants to make sure that their favorite chapter/hive/craftworld/chaos lord is included so they can play that exactly. To this I say: "Think bigger."
The battle here is for controll of the galaxy, not some specific sector. It's the Imperium of Man, in it's struggle to rise to the top, or of the Ancient Eldar in it's fight to regain the glory of old. Or the Tyranids to finally controll all the biomatter in the galaxy and to be able to say "It's still not enough"... Thats kindof what I envision for a Warhammer 40k mod for GalCiv2.