I don't think any cloth room setting will do that.  My suggestion would be to use a prop to guide the cloth.  If this is a circular skirt like a cheerleader skirt or a poodle skirt, I would add a primitive plane to the scene, placed just a tiny bit above the ground, and centered under the doll.  In frame 1, scale the primitive plane to be just big enough to catch the draping skirt.  In a frame fairly close to the end, scale the primitive plane up maybe eight times bigger, or so.  When you run the animation, the primitive plane's expansion will pull the skirt outward.  Have some frames beyond the end of the primitive plane's expansion so that the skirt can rebound.  Remember to untick the primitive plane's visibility before rendering.

 

This is the closest demo I have in my album,   with the doll kneeling...

Some gal requested this as a birthday present.  I don't do much goth/vamp;  more of a TinkerBell-loving guy myself.

 

Another method which might work is to keyframe the doll to drop her legs through the floor, pose the legs during the frames where her legs are submerged, then raise her back up to sit on the floor.

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