OK, the Army Book: Empire (German) has the Nuln army list at page... 78. Together with alternative army lists for: Emperor\'s Guard, Sigmarite Army, Marienburg Mercenary Army, Cult of Ulric, and Crusade Army. In short, a chaptermaster may not be the General, as shooting is un-knightly... Mortars and Cannons become Core, Knights become Rare... Thats pretty much it. All rules and point costs stay the same.
Hope that helps