This is what I would suggest. Download and install the "SpawnCharacterP6 update" py script from ** svdl's Free Stuff**. Inject the first character into V4, then run the script. It will create new morphs and FBM, and allow you to assign them to any PBMCC channel. REM the first character, then apply the new INJ files you made, then apply the second character.

If you like, once you get the mix of characters how you like it you can run the script again to create a new set of morphs that will contain that mix, so that you only need to apply one INJ file in future to achieve that character mix.