Sublime Text 2 Layout: Grid: 6

Main.Sublime-menu file

// "Cols" and "Rows" specify the coordinates in x and y. 
// Cells create cells by indexing the rows and cols array in the order [startx, starty, endx, endy].
// Edit your Main.Sublime-menu file
// Mac: /Users/yourMacName/Library/Application Support/Sublime Text 2/Packages/Default
// PC: C:\Users\yourPCName\AppData\Roaming\Sublime Text 2\Packages\Default
// Example Below:

{
     "caption": "Grid: 6",
     "command": "set_layout",
     "args":
     {
        "cols": [0.0, 0.33, 0.66, 1.0],
        "rows": [0.0, 0.5, 1.0],
        "cells": 
        [
            [0, 0, 1, 1], [1, 0, 2, 1], [2, 0, 3, 1],
            [0, 1, 1, 2], [1, 1, 2, 2], [2, 1, 3, 2]
        ]
    }
}