Hi Paul,
the thing is very very tricky:
using paks without going down on c++ code is strictly usable in the production of a single ue4 project and its DLCs or “patches”. when you try to put a pak of an external project inside the builded projet A
the system have problem with the naming of the folders and other things, and it can’t run the content in the pak.
The way I found that work is overall complex and not yet “stable”. I made a c++ class, and inside of it I run some code that “mount” the new pak, then you have to “inform” unreal that it has a new path where it can find content. The worst part is that you need an external source of information about the name of the pack and the content inside, is not an automatic process…
It seems promising, but we’re waiting on best improvement in this field from the UE4 dev team.
I advise you to document yourself about this thing of “mounting” pack via code