Yeah its a good idea though I honestly dont think a dvd, perhaps a one off chapter or something, for me prep is usually a sketch or a few on paper then once the design is nailed then I'll do something similar of the mesh/wire itself on paper, layout where deformations etc will occur, be them for facial expressions or clothing (elbows, knees etc). Perhaps once the texture dvd is done...as Im adding a couple of lessons to the beginning of that, almost like a practical theory of texture methods...

Jay