Actually (unless I'm misunderstanding you), SRCA (and all of these scene modalities) happens at the level below the PSR report -- within the scene. So if each Element in the PSR is a "scene", these modalities tell you how to structure that scene.
It wasn't included in the software I believe because there was some thinking that it was too fine a resolution to be useful to writers (forest for the trees etc.). But Jim has been using it with some of his clients to useful effect.
TKAD is Thought, Knowledge, Ability and Desire, which, at some level, is what every quad in Dramatica boils down to. In this context, TKAD is used interchangeably with the top of the model -- the Domain level - [EDIT- thanks @mlucas ] Situation (Universe), Activities (Physics), Manner of Thinking (Psychology) and Attitude (Mind). So each scene will have each of these elements in it.
BTW out of the four, this is the mode that @mlucas and Jim say is the most useful for scene construction.