Hi again @SimGuruModSquad
Sorry to take so long; I was away from home.
To keep the test case simple and not even get into whether my tool is working, here's what I did:
1) Extracted the game yfChestDroop shape deformer map (Instance ID 0x1F15581079614160) into a package, put it in Mods, and tested. Everything worked fine.
2) Changed the Instance ID to the ID of the yfChestLift shape deformer map: 0xDB7D590C08AF3CDB, so now the chest droop data has the chest lift identifier and should replace it in the game. Now as soon as I try to lift a female chest, all the body morphs revert to the neutral state.
Link to my test package: https://sites.google.com/site/cmarnycsite/cmar_yfChestLiftDMapTest.package?attredirects=0&d=1
Thanks!