(i live in a country were snakes are not realy allowed, so i cant take mine to the vetrinarian, cause they are obligated to turn them into the police, who kills the snake..)
I'm sorry if I'm taking this so negatively, but is it wise to keep "illegal" snakes in Norway if you know you can't go to the vet if they have any problems? They will eventually get something and then what will you do...? You just can't go quelling your snakes when they get ill or leave them suffering to their fate.
Owning a snake is not a cheap business once they get ill, so you should take responsibility.
Have you considered making trips to your neighbour countries that do allow them for vet visits? Can't you register your snake legally or something?
I know Finland allows pet snakes, but it's not the common pet by far (even birds are considered exotics), so finding an exotic vet is quite difficult.
Sweden allows them but they have to be registered (something almost no one does), but they'll have exotic vets.
About Denmark, it has very strict laws on owning and importing snakes, so you'll probably need a permit and is one of the most difficult options.
I would research and consider a trip to any of these neighbour countries if you live near enough.
Again, I'm sorry for the criticism, but I feel you just shouldn't have your snakes this way...