Any and all Pre Heresy armies.

I've been trying to find out more information on PH armies. There is lots writen about the PH space marines but not alot on other forces, particularly PH Imperial armies. Below are the first 3 soldiers of my Prospero Spire Guard to fight along side my Thousand Sons and since the photo i've now got a 10 man squad.

I make sure to use 80's or 90's citadel weapons for most of my models to make them appear from another time but other than look at the "John blanch" artwork and just use Vostroyans im abit stuck.

So I really want to pick every ones brain to see if anyone has other ideas for PH armies, human or alien.

http://www.heresy-online.net/forums/gallery/data/552/medium/Spire_Guard.JPG