lan/hamachi multiplayer?

well i have nearly finished a game and i want to know how to make lan/hamachi multiplayer, like just a simple script or something that will make it so that it can be played over lan. it is a 2 player game and each player has different controls so all i would need is a script or tutorial or something that will let another person interact with the game, and then ill put a thing at the top of the screen saying "dont press the other players controls or chuck norris will roundhouse kick you in the face"