How to change the shape of the body part?

Hi, I am working on making an editor to create human characters. At the beginning of the game, the user can create their own character whatever they want. In this editor, they can change the shape of the body. For example, they can create a character with very heavy belly, or they can change the size of breast (eg. the size of breast or belly is the range between 1 and 10). If they change the size of each body part, then the editor shows how the character will be looked like).

Is there any way to change the body shape by using torque editors, scripting or programming? (for each body part)

Let's say we have only one woman 3d model (it is imported by .dae format and all animation are included).
Of course, I can change the size of the body or the height of the body by simple editing (change the scaling of the object, for example). However, I don't want to change the size of whole character, but each body part separately.

Does anyone have an idea?
I'd really appreciate if you can help me.
Thanks.