I learned how to use PVKII models with Source Film Maker. It is apparent to me that I am not alone, in that regard.
Regardless, the models initially did not work for me, so I changed VertexLitBeckmann in the VMTs to VertexLitGeneric. If I have made a grave error, please let me know.
For my first endeavour, I made a silly picture.
If I make anything else, I'll put it here. Like those other guys who do this.