I use the term "studio" loosely- my spare room in the basement, with a couple of houshold lamps and a bulb mount in an aluminum reflector! I don't know if there is much i can do with the lights.
As far as placing my shadows at precisely zone 1 or zone 2, then I would need a *huge* amount of development increase to get a couple of stops of contrast increase. It is my understanding of viewing + development charts that that it almost exclusively only affects exposure above say zone 4. The toe, where you suggest placing my shadow, would probably not be affected much. I may be wrong here, but this is what I have learne through a little research.