Okay, the first picture of the write up at http://www.wattora.com/mods/twolow/
is to show what "Push Button" 4WD looks like. It is there to distinguish that system of engaging 4wd from the type where you have to shift the stick to put it in 4wd.
Since there was confusion about what the 2lo mod did and that confusion seemed to stem from the "locker mod", I captioned the switch I use to disable the locker mod with "Switch for the "locker mod" This is a different mod from the "2lo" mod." That switch is otherwise unrelated to the 2lo mod.
That switch IS my locker mod. In the down position, the locker performs as stock, engaging only in 4lo. With the switch in the up position, it grounds out the gray wire for the locker mod, allowing the locker to function in all xfer case positions. I did that so that if someone else drives my truck, the locker cannot be accidentally engaged while they are on road. I could have foregone that switch and simply grounded the wire so that the locker mod was always active and the locker engaged with a press of the stock switch, but I wanted to be able to lock out the locker in 2wd.
Neither the locker mod nor the 2lo mod changes your shift points, I also have a 2001 auto, so you lost me there.