First I am going to ask what software you are using? Is it Daz Studio? Poser? or something else?
If you use Poser, you will need to use V4 (Victoria 4- Daz3d Figure) and you will need clothing for V4. As Chohole mentioned if you want to use the texture set that ladyofmanyfaces suggested, you will first need the Morphing Fantasy Dress for V4. You can find it here:
If you are using Daz Studio, you can use either V4 or Genesis. The Morphing Fantasy Dress for Genesis is here:
The textures that ladyofmanyfaces suggested should work for either dress.
Hope this helps you!