Cheers
The Dread can be found somewhere as a WIP-thread, eother on the Modelling or Projects board. I think it was called "Fourlegged freak" it actually started out as a tutorial on doing the face if my memory serves me. So all you wish to know should be there.
As for the colours, I think I'll use a combo of green, bone, blood and well...flesh. This might differ a bit on the different units and models though. But at the moment I'm a bit far from painting. Got way more cutting and Greenstuffing to do before I get to that stage.
Really glad you like it.
EDIT:
sorry, this is the face WIP