The best I've come up with is a combination of shortening the Y scale in main body parts (hip, abs, chest) and useing the stretch arms and legs (negative value). Then seperate pieces of the body need to be individually adjusted for fit. Even then there are some join problems. This isn't a Poser or Daz Studio type issue, it goes back to the basic model of the figure. You can get quite a bit of proprtional height variation just using the stretch arms and legs. The biggest problem is getting clothing to fit the morphed character. The strech morphs don't corrospond to any clothing I've seen available. A good morph master could create the kind of variation you want. But then they'd have to come up with clothing to fit. On a for sale item, it increases the work and decreases the profit.