a script to hide or show the zeroed dials is fairly simple.

import string
scene = poser.Scene()
fig = scene.CurrentFigure()
actors = fig.Actors()
for actor in actors:
    if actor.IsBodyPart():
        parms = actor.Parameters()
        for parm in parms:
            if parm.IsMorphTarget():
                if parm.Value() == 0:
                    parm.Hidden(1)

 

change parm.Hidden to 0 to show the dial again.