Thanks RAMWollff and coldrake for the detailed information. I wonder in what kind of troubles I run, when using the 3rd party characters with V4.2. They expect some morphs to be embedded and won't inject them with the pose file. Hmmm, wonder how this works out...

So A4 will be a morphed V4.2, or will it be remapped too, like A3 was remapped compared to V3?