I think "Dial Cleaner" just hides the dials without actually deleting anything. I don't know of any way to do exactly what you want, except deleting each unwanted morph channel by hand in "Morph Manager 4". You may be interested in the Python script "Spawn Character script" by svdl. Apparently it only works in P6. Another thing you could do is spawn a morph for the head, then remove the injected morphs with the REM poses. This would remove the deltas, but still leave the morph channels in the figure.