This works very nicely.  I've done some node modifications and have been testing.  However, the face vein displacement map shows a huge discrepancy between the right and left sides of the face.  Displacement looks normal on the left side of the face, but the right side shows receding vein lines as opposed to elevated.  I would show images but it's rather late at night here.  If someone can verify what I'm seeing then there is a problem with the way the map was created.