I think I have an intuitive understanding of the range of possible positions, but I haven't quite matched these intuitions with the correct names. Feel free to enlighten me if I misuse any of these labels. It makes no predictions. It seems to me from what Stephen Jones has said, that PC is an umbrella for a range of possible theories. We observe that animals, though different, share many things in common.
Some animals are more similar than others.
Some body parts seem to play more of a role in some animals than others. Evolutionists make these observations and jump to the conclusion that new animals came from old animals through a genetics driven natural selection process. A theory compatible with PC would say that new animals came from old animals through a supernatural modification of one animal into another at various points in history. But am I right in thinking that it doesn't spell out exactly how large a gap would be. That is, it proposes that there are significant gaps, but given what appears to be a large gap, it may be that it actually represents two smaller gaps.