Do you have the DAZ Morphing Fantasy Dress, or other dress that contains sit morphs? If so, you can try transferring the sit morph morphs to this dress. It often works, IME. Otherwise, your best bet may be magnets. Or maybe a combination, with this dress, since it has a double skirt. Transfer the sit morphs, then use magnets to pull the overskirt up a bit, so it doesn't cut into the skirt below it.