Yes the resulting pz2 is a Delta Injection pose. That is to say it will add the morph to your character. I beleave that the Unimesh figures have a number of targetGeom (morph) channels reserved for third party morphs, and you should probably inject your morph into one of these channels. I don't have any of the Unimesh figures, but I think the channels are named "PBMCC_01", "PBMCC_02" etc.