What  fun Deecey  I used to have a passion for painting portraits in real media now it's switched to cg ones as well as photo manipulation.    Haven't yet had a go with Poser 7 face gen oddly enough.

Here's a mag foto of Scarlett [ the more references the better. right?]  though it's a different angle to yours the shape of face and nose is quite distinct so it might be useful.

Love the facework on your Cleopatra/Liz Taylor.  This one will no doubt end up as good. :)