[FO4] Refitting Hairs Grom "Black Desert Online Hairs" To Vanilla Head

Hi,

I've wanted, for some time, to use some of the hairs included in BDO Hairs but I've noticed they're far too big for a Vanilla (with hi-poly faces) head. I've learned recently that BDO is specifically fitted for the author's overhauled head mesh (lazy, don't want to destroy current harmony in my modlist). Does anyone know a decent way of going about refitting them to the Vanilla sized head? I'm aiming to do just a handful (namely the Yakuza ones) but if I have to refit the entire pack I'm willing to do that.

Thanks in advance.