I got tired of looking for Assisted Install.txt files and remembering all the commands. Plus I got tired of helping clients build them and tell them about all the cool properties that you can ONLY set - I am looking at you AI_NONEWDATABASES.
IMHO this file is the best way to store license keys - in the format that you can use it.
So I built a simple wizard - FileMaker™ Assisted Install Wizard | Neo Code
Feedback welcome - but I reserve the right to ignore it.