Reset all windows to primary screen for the given application

reset_windows.scpt

set _app to text returned of (display dialog "Reset application: " default answer "Google Chrome")
set _offset to 30
set x_start to 100
set y_start to 15
set _width to 1550
set _height to 1000
set new_col_at to 3

tell application _app
	set last_x to (_offset * (count windows)) + x_start
	set new_y to y_start
	repeat with x from 1 to (count windows)
		set new_x to (last_x - (_offset * x))
		set bounds of window x to {new_x, new_y, _width, _height}
		if (x mod new_col_at) is 0 then
			set new_y to y_start
		else
			set new_y to new_y + 30
		end if
	end repeat
end tell

Nice, I will be using this =]