You cannot create schedule of wall types and it's layers with their thicnesses, why is this still unavailable?
Here in Europe, we do not use Keynotes, and (as I can see) it will never going to be accepted, so we need to do it 'old way' and that is to give our walls Type Marks and schedule each wall type with it's layers, their materials, some comments (maybe descriptions) and, of course, thickness of each layer.