My SpawnCharacterP6 python script will do what you want. Since V4 has injection channels, you can use it.
Here's how you do it::

• load V4, no morphs, put her in zero pose with IK off;
• apply ONE of your morphs at its maximum value;
• run SpawnCharacterP6.py and let it create INJ/REM poses.

Rinse and repeat for the other two morphs.

You can find the script in my freestuff.

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