I know you mentioned you wanted to try doing it without postwork, but it will probably take less time to do it that way. V3 has a lot of material zones that you'd have to change, whereas the quickest solution might be to render her normally, and save the render as a TIF file. You can then load the TIF file into a new layer in an image program (Photoshop, Paint Shop Pro, Painter, etc) and use the alpha channel in the render to hide or delete the solid background of the render.