While I no longer use this latest compilation with the latest version of ReiNX (currently at version 1.7.1), I still find it handy for sourcing the "titles" folder required for running homebrews which oftentimes come absent with the latest build of ReiNX.
@Everyone To those who are encountering the "Error: Package2 Magic Invalid," it means that the files in this compilation are already outdated to work with the version of CFW (ReiNX) you are trying to boot with. Although I'd hate to detract users from this page, the best answer to that, in the mean time, is to download a more up-to-date compilation of the essential files. At the moment, tumGer at GitHub has it.