Some B737-400 aircraft where delivered with the low cost, analogue, instrumentation package. This archive contains the bitmaps, and panel. cfg file modifying the msfs default B737 2-D, and 3-D cockpit environments to reflect this delivery option. You should be familiar with operating reference book file installation. Enhancement by Chris Arrington. Some, required, added instruments gauges (not included) designed by Richard Probst. See the README file for far-flung details. Enhanced by Chris Arrington