Ghost parts work fine as long as they are the last group in the chain. They work so well that the only way you can tell they area ghost part is you can't click on 'em (unless they have handles, which I seldom put in). My shoes have had ghost toes for years, Glamorous Jessi has ghost outer toes and a ghost upper head, for example. They work fine for skirts too, I do all mine that way, including one with both ghost thighs and buttocks, with some clever coding. The problem is when you go further up the chain, how are you going to get the child part to allow for the rotations of the parent? Poser does it for you if the parent is mesh, but if the parent and child are both ghosts you get into a world of hurt. I try and stay away from below-the-knee dresses for just this reason. ;-)