hehe teleporting necklace for rp? are you sure your rp mod is going to be realistic
anyways, id find a way to reset one's view so it is centered (isnt there a command that does that?) then get where they are aiming, then use some math to find out which way to teleport them (i.e. north south east or west of their position.) you could do (where 1 = player positon and 2 = aiming position) if y2-y1 < 0, then set the player origin to his origin but -200 y. if y2-y1 > 0 then set player origin to his origin but +200 y. If y2-y1 = 0, then do the same thign but with x's (i.e. x2-x1 < 0 and > 0)
It might not work, but its worth a try!