what interpolator, if any, controls movement of the character during animations?

specifically i'd like to change the speed of movement and distance traveled during 1st person power attack animations. however upon loading 1hm_attackpowerfwd into 3ds max, i see that the character never changes position, only the legs move as if ground is covered. is there some aspect that tells the game to move your character forward upon performing a lunging attack animation? can i edit this is nifscope?