Providing that you have the right to distribute the "V4 face morph Kits 1-3" morphs, and I'm not clear on this from the blurb, but it looks like you may be able to. Then using "SpawnCharacterP6 update" should produce a viable INJ file with no further action needed on your part.

But please note that the INJ files produced by "SpawnCharacterP6 update" contain deltas, so you should make sure that the morphs are either entirely your own work, or that you have permission to distribute any third party morphs used in their creation.