Moving an object

I've been trying to figure out how to make an object move in response to a keypress. (Just so you can see what I'm trying to do here, think of like a little remote controled robot or something that will move 2 units forward when you press a key). I've tried using setTransform but it does seem to do the trick. If I have the World Editor up when doing this the bounding box of the object moves but not the model itself. Anyone have any ideas?