ok.

so way back when posette was the main girl, and people were pretty free with sharing stuff, lots of morphs were the whole obj.  for instance, a head morph was the whole head, and distributed part of the mesh instead of just the difference (deltas).  then i believe traveler (of rdna fame) published info about morph squishing.  i believe his aim was just to make the morphs smaller and more portable, most people being on dial-up.  but it also serves the purpose of protecting the original mesh.

but some of my posette morphs are quite old.  i came around after v2 was out, but there was still a huge amount of posette content, and posette had a ton of custom made morphs.  i don't think i even have all the ones i once downloaded.  i think she has more custom morphs than v3, and almost definitely more body morphs.  but i digress.  the thing is that some of these morphs are the whole posette head.  so even on, say, linlin, they don't combine well. it affects any difference between the two morphs.  so if one morph just changes the eyes, and the next just changes the lips, to make the two work together is pretty much impossible because each will set the other back to the original shape.

but i know that there once was a morph "squishing" application or script.  i'm pretty sure that people need something like it today for distributing any custom morphs for daz figures.  if you have just the differences recorded, you can layer that eye and lip morph.