Warhammer Grim world of perilous adventures is my favourite RPG setting.
Here is some useful background material related to Warhammer world that I scavenged from internet in the last few years.
Maps pack : This pack contains useful maps of Empire and the rest of the Warhammer world.
Background pack : There are lots of useful articles in this pack that can help you give better insight into Warhammer world.
Scenario pack : Here you can find a bunch of nice scenarios.
(c) 2005 mmmattta