Look in the client.java for wildy or something youl see some cords and there is some text that says safezone whith cordes just put the cords of the safe zone you want to have in the cord list and save and then ur done...
i don't know for sure but i tryd it and it have been a long time ago since i coded servers. so don't blaim me if it doesn't work
It won't work.
That method is wrong.
I recommend having a flick through the tutorial section.
Although his question could've been answered cuz ceums is on a gravedigging spree.