02/27/2010: "(non-celshaded, but cool) Carm3D's video tutorial on how to mix ZBrush displacements with MDD displacements"
This is how the ZBrush displacements got layered on top of MDD files exported from messiah:studio for Animal Planet's Animal Armageddon. For that show, the ZBrush texture was piped into the "Displacement" node input on the Surface Node in the Surface Panel's Node Editor.