Reset the collision depth and collision offsets, from their default 1 to 0.125     It will take longer to sim, but the result looks better.  1 results in clothes inflated and floating 2" away from the body.

     Combine the dress and the belt as a single dyn prop.

     Make the loop(s) of the dress under the belt constrained.

     Make the belt constrained.  Engage cloth self-collision.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5