Let me give you a small idea here...

 

Mind you, this is D|S, so the scaling will work perfectly, as others have said Poser 8 will.

alternate ref: http://www.renderosity.com/mod/gallery/full.php?image_id=2246585

As you can see, the default Vicky on the left (with only a mat, a quick hair tossed on, and a quick bikini) stands at around 6' tall in heels, more or less (by my crappy and likely inaccurate scale). The petite Vicky on the right stands at an appreciably shorter stature - same bikini in both figures, merely clicked into place.

The diff? I cropped the yScale on the chest down to 92%, the shins and thighs down a bit, the xScale on the arms down, then I cropped the entire body down to 93% or so. 

I went a bit too short (I wound up replicating a teenager, as it was a bit of a 30-minute rush job using Laura's mesh as a rough guide to shape the V4 figure) but it should serve to illustrate what I was trying to say.

 

(I think I'll keep it... needs a bit of tweaking, though.)