You can remove the snakes can't you? I think they are attached to the headband that comes off.
I honestly think they would be fine using the same method, I'm about to do a boil wash on a Viperine so I can tell you how it goes.
So I actually just ended up straightening my Viperine customs hair (not so good with boil perms just yet) and the snakes did just fine with the boiling water. No problems at all and I wasn't trying to avoid them or anything.