Download zip file and unzip to a folder like My Documents/AutoIt/Pal.
Include one or more Pal library files in your source by using include
lines, for example like this:
#include "..\Pal\Window, Screen, Mouse and Control.au3"
#include "..\Pal\Logics and Math.au3"
#include "..\Pal\String and File String.au3"
#include "..\Pal\Dialogue.au3"
#include "..\Pal\Lists.au3"
#include "..\Pal\Miscellaneous.au3"
Documentation is available in the help file Pal.chm.
For easy access in SciTe: Start SciTe Config in Tools menu and set User Include Folder to the unzip folder for instance My Documents/AutoIt/Pal. Call Tips (= the parameters of a function): Go to Tools tab in SciTe Config and run User Calltip Manager.