Irrlicht Engine

i ´m trying to change the size of some parts of my model.

Example, i have a game under contruction that u can pick a char, change texture, hear and all, but i cant let the user change something like the height of the model. Or mabe like in GTA:SA where the main char can be realy fat or muscular.

How can i make something like that? i have to load diferents models but in diferent physical state? or something like that?

PD: Irrlicht rules!

1. You can construct your object from different nodes, then apply scale to different nodes (parts of your object)
2. You can use mesh deformations, i dont know how to implement it - never used it