I finally managed to figure out what was going on with the morphs when I was using Injection Magic.

I had to have the Morphs ++ and Girl4 morph injections applied to V4 BEFORE I injected the custom morph. I should have known better lol... the Inj and Rem work fine now.

When I get bold enough, eventually I'll write my own Inj and Rem... but it seems so very complicated at the moment  ^_^

Thank you all for your help.