The peddle commander speeds the reaction time that your gas peddle talks to your throttle body. Some feel a delay, in stock form, from the moment you step on the gas until your truck accelerates. I haven't really noticed the issue on this truck myself.
The procedure above turns off the mds so you will not have cylinder deactivation. It will always be using all 8 cylinders. It will still shift through all 8 speeds as normal but I have noticed once you do this you can see what gear the trans is in at all times, which I thought was kind of cool. I must admit that I don't use this procedure often because you have to do it every time you put it in drive.
