Glenn.
Thanks for looking, The chalk brushes are a little hard to control for me, in the last paintings I was painting with the grid on, to get all the close I can to the orginal, but my brushe were more stable than this,yeah, Zephyriās painting is awesome, with a such beautiful technique. 
krispee
Aw Thanks, I recomend that you experiment with the default galleries, some of them are great, here are the brushes Im using by the way, some of them are modification of existent brushes others are mine, try them with the smudge tool too, glad to be helpful.
Art2.
Beautiful lineart start, good to see im not the only one that start with linework, really looking for your next update.
Ricma.
Will wait to see your work:), BTW Neville Page haves a DVD here http://www.thegnomonworkshop.com/dvds/npa02.html explaining how to colorize a traditional B/W render, in PS, basicly, he uses brushes with differents blending modes such colorize, multiply and softlight, good luck on your paint.