Hi, amateur modder here with a question

I've been fiddling with the CK for some time now, trying to get back the "Hated State" of vampirism stage 4, but no luck so far.
I've tried, among other things, to add the similar effects of the Vampire Lord Change for starters, but my lack in knowledge and experience seem to prohibit any progress

EDIT: If I could add the PC to the faction "VampirePCFaction" via the "AbVampire04b" spell somehow, then that might be the ideal solution!

So I was wondering if someone could throw me a few pointers on how to accomplish this?
Actually, any information on how to alter the PC's faction by external means (spells etc) would help!

Thanks in advance (off to bed)!