I export the figure and clothing separately in .obj format. If the figure has hair or is wearing/holding any other props I export those separately, too. Then I import each item one at a time to RDS, making sure to pick "simple meshes" and "only one object". Make sure to import everything before trying to scale or move any of the objects. I import each item, group them, then change the size. That way all the items stay locked in the same relative positions. When exporting figures from Poser (including clothing), I leave the defaults checked in the box that comes up when you export. For props I uncheck "weld body part seams" and check "include existing groups" and "include body part names". This is the method I use most of the time and it works fine, at least for the normal P4 woman (haven't tried with Vicky). Conforming clothing should come out right.