We're having issues setting up the assisted install file. We can't seem to implement it into the installed package. We also can't seem to modify it within the package itself (won't save/will just generate a duplicate file).
It is not a permissions issue either. We no longer have the option of right clicking and choosing "Show my contents," as we could for previous versions.
Long story short, we are a little perplexed in this facet.
I assume you're using the OS X ".dmg" installation package? You cannot modify the Assited Install file while it is still in the FileMaker shipped .dmg package because it is read only. You have to pull the files out, modify the assisted install file and then create your own .dmg installer.