Tracking down a working has become harder as older forums shut down, but the tool remains indispensable for any serious PES 2017 modder. By following this guide, you can safely download, install, and master the CPK File Builder to create your own kits, faces, and patches.

This is the core process where we compile the files.

Yes. The same builder usually has an or "Extract" tab. You can open any existing .cpk (like dt80_100E_win.cpk ) and extract all assets to edit them.