Add the dress to your scene as usual, and conform it to the figure.
If the figure is posed already, you'll see that the skirt doesn't
follow the legs (but the top should conform to the body).
Now go into the cloth room. If you need help getting started in there,
try my Bare Bones Cloth Room Tutorial.
When you come to the part where you decide
what to clothify, choose "Dynamic Skirt".
Now just run the simulation as usual. The default cloth settings
will give good results, but don't be afraid to experiment.
You may find that Vicki's nipples will poke through the top, since it's
so close fitting. Embarrassing, but easily fixed.
If you have the V3 body morph pack, inject the NippleGone morph
and set the dial to remove the poke-through.
Alternatively, just go into the material room and set the
nipple material to 100% transparent (see picture).
If you use V3RR (reduced resolution) this shouldn't happen,
since the poor lass is lacking in the nipple department. :(