Основное там тут: game transfer to OFW method: "Each bubble represents a folder in the path dev_hdd0/vsh/task/
Inside the folder is the .pkg file, some "content information files" (such as PARAM.SFO and ICON0.PNG), and some .pdb files (some are called "project database", but actually I think it means "preinstall database")
Project Database (PDB)
All that can be created manually, the .pdb files are those that do "magic" and are responsible for the bubble.