[ Closed ] One hit kill?

Hi!
I'm about to put up some servers, named [RJ] Clan Servers btw, and I would like to know how you can change the settings so that you die from only one hit, like on the Moctel beachfight servers for example.
And the second thing I would like to know, is how you make a map/server with only one weapon, like the Moctel servers for example, again. There it's only the laser you use, and you have it from the beginning.