Making a V4 clone for Dawn as described in 3doutlaw's tutorial, allows you to autofit V4 clothing to Dawn.  I used the instructions and made a Genesis clone shape for Dawn.

Here is Alexis for Dawn wearing left to right Aussie Girl, Sadie dress and Enamore Mage outfits for Genesis.  My autofit clone is not perfect by any means, but with the help of the smoothing modifier feature of DS4.6, it corrected poke through and collision with Genesis and the clothing.  I'm finding not all outfits convert well, but I'm suprised how many do, particularily shoes.  Looks like Dawn will be raiding content closets for a while.

@3doutlaw - Thanks for making your autofit clone creation tutorial, it's very clear and easy to follow.