I found a small script for Poser called MorphTidy. It lets you delete all morphs that matches your search criteria. Well, it doesn't work. Maybe its for earlier versions. But after debugging it, almost all of it works except the very part where it deletes the morph target it found. What the original script tries to do to delete the morph is: 

print "Deleting: ",ps.Name()
ps.SelectActor()
scene.DeleteCurrentProp()

As you might have guessed, "ps" addresses the parameter it found that matches the search. The part where it fails is the ps.SelectActor(). But I'm not sure if scene.DeleteCurrentProp() will work as it never got there.

So I looked for any command that could remove a morph target, and the closest I could find was RemoveValueParameter. However, I just can't get it to work on removing a morph target. Maybe its not for it after all.

Well, anyone knows of a command or a process that can be used to remove a morph target?