If your goal is simply to play PS3 games on your PC or console without legal and security risks, you have several ethical and safer options.
Before we dive into repacking PS3 discs, let's talk about downloading them. There are a few ways to obtain PS3 disc images: ps3discsfb file download repack
If you have downloaded a "repack" that is missing this file, you can restore it using these methods: If your goal is simply to play PS3
Are you having trouble getting a specific game to in an emulator, or are you trying to create a PKG file from a folder? ps3discsfb file download repack