Its easy enough to avoid the translate and rotate dials when doing this sort of change .

in the parameter info IsMorphtarget identifies the morphs and Minvalue and SetMinValue will tell if it needs to be set  .

So loop through all body parts, all parameters , check if morph, check if minval == 0 and set it to some - value , then save the figure  to store the changed values in the cr2 .