I'm creating vampire network and want to have vampire guards to defend the place against intruders, like the human guards do.
However i want it so that the vampire guards will attack on sight anything that isn't a vampire including the player, or if the player is a vampire, that they leave them alone.
Is there a way to make this work using either the factions or some scripting? Since humans recognize you as a vampire and attack, and leave you along when your not i'd like it to work the other way around too.
help and ideas would be appreciated!

I'm pretty sure you could give them a faction with +100 disposition towards vampires and nothing else, then set their aggression high, so they try to kill anyone else. 5 or less only fights defensively. 20 aggression should probably do it, but that could be a bit high. You'll probably have to try it a bit.

thanks
I have set their disposition to vampire at 100 and when i test with a vampire character it works fine, but when i try with a non vampire character, the creatures attack the non vampire character as they should, but the NPCs don't...
The Npcs are guards but they have no script, i have also tried with ordinary characters as vampires and it doesn't always work either...As soon as i add more to their AI than just wandering i start to get issues, that's why i felt i needed a script to sort out the problem.

Right i've managed to make the vampire NPC hate the player if it's not a vampire by using the "PlayerFaction" and like the player if it is a vampire using the "PlayerVampireFaction" But it still have the issue where the custom NPC still don't attack a non vampire player on sight..
(I could add them to the creature faction but i want to avoid doing that, because you can yield a creature and i want it to be possible for my vampires)

I also have a silly but irritating issue where the vampires are scared of the PC when as a fully fledged vampire. Irritating because it defeats the whole purpose of the mod...