Just thought I'd post an update on this:
Astute readers might have noticed how similar the premise of this mod is to the Norbayne project. Congratulations, you now know where I got the idea for that game from!
Anyway, as Ladyhawk can attest to, I did end up making vampyres make more sense, plus adding several new races. But that's about as far as I got with it all before I had to give her back the disc.
She wanted to play it.
If at some stage I get some money, I might just go get the game myself. Maybe.
But until then, we're at a standstill until Ladyhawk learns how to mod.