This post outlines a method I came up with to use a single AutoHotKey script to auto-load any number of scripts in a sub-folder. It also allows every script to have its own autoexec section, and to hook into a timer for event-type functionality.
AutoHotKey scripts that are 'persistent' need to be loaded into memory by Windows just one time. If you have several of them to load, you can get them all individually, but you end up with a system tray full of little green 'H' icons.