I'm gonna ask you something that may SEEM unfriendly, but I assure you it is:
What possible use could you derive from "stacking" scripts together?
FPI is a conditional procedural language, meaning anything you "stack" could very well have just been added to the previous script... so why not just edit one of your scripts and make a new one with the functionality of two?
The one and only,
Those who live in the past, are destined to insanity. Those who live only for the future, will be slaves to their ambitions.
Those who live in the moment... only they, are truly happy.