Anastasia's head doesn't seem vastly different than V4's in general shape, at least as far as fitting hair. It's some 6-7 inches closer to the ground, which makes her a more realistic female height than Vicky's 6'2" in Poser measure. Her body shape cants it a little to the back, too.

I just thought maybe some early Anastasia buyer had converted a lot of hair for her and could share their experience. Maybe it's just as simple as translating it into position, scaling down slightly and resaving the GNDA version to the library. That worked for Bun Hair, which leaves some margin for error. Let's see how it works with a close-cropped do that shows more clearly how it sits on her head.