This is an Illustrator CS6 plug-in/extension on OS X called Triple Triangle. Firstly, I know about "fill existing user home dirs" and all that and have relied on such functionality before with other package builds and have been successful. But not this time.
Composer is not picking up a particular home dir file overwritten (or added) at ~/Library/Application Support/Adobe/AI CS6/en_US/New Document Profiles (I am replacing the print.ai profile with a customized one).
I tried adding the file to the package source manually in Composer and thought it might work once I enabled FEU but it does not. While my experience is still relatively limited I am a little surprised and confused by this; only thing I can come up with is maybe because it's going into an Adobe dir (I know Adobe package building is often if not always 'different' and more involved but not the details of that).