Hello LuKePicci thanks for the tip! I can definitely include a reference on the Visual Studio approach in the post. The reason I have focused on the manual approach (the one explained here: Fix issues that prevent your desktop application from running in an MSIX container - MSIX | Microsoft Docs) is that, typically, the Package Support Framework is geared more towards IT Pro who needs to repackage apps and they don't have access to the source code.
If you're a developer and you have access to the source code, the Package Support Framework should be used as a last option. The best approach is always to change the code to accomodate the requirements (in this case, adding in your app the logic to copy the files you need in the appropriate folder).
Thanks for the feedback!