All credit to XVortex at PSXHAX.
Iam only pastig his tutorial here.

Ok, guys, let me introduce the PKG Kitchen - the toolset for the easy creation of PS4 packages.

;)

Toolset does not use flat_z method to assume gp4 package structure and (probably) has a issues, but it allows you to create more or less working packages and use it as a base for experiments.

Related Files:


Brief Instructions:

0) Extract Fake PKG Generator into the tools folder;
1) Clean the kitchen environment (run _clean.bat);
2) Turn on the console;
3) Insert disc, make sure it is fully installed/copied (skip for PSN title);
4) Run the ps4-ftp-vtx payload, connect into the ps4 by FTP client;
5) Minimize (PS Button), but do not close the WWW Browser;
6) Run your game, make sure to get main menu, minimize game (PS Button);
7) Copy files:

Code:
a) /mnt/sandbox/pfsmnt/CUSAxxxxx-app0-nest/pfs_image.dat --> dump\pfs
      (please note your Title ID - CUSAxxxxx)
   b) /user/app/CUSAxxxxx/app.pkg --> dump\pkg
   c) /mnt/sandbox/pfsmnt/CUSAxxxxx-app0/eboot.bin    --> dump\app
      /mnt/sandbox/pfsmnt/CUSAxxxxx-app0/sce_module/* --> dump\app\sce_module\*
      /mnt/sandbox/pfsmnt/CUSAxxxxx-app0/???          --> dump\app\???
      (??? is other prx modules, if any, depends on title)
   d) /system_data/priv/appmeta/CUSAxxxxx/*           --> dump\appmeta

8) Restart your console, remove disc, uninstall the game (for further testing);
9) Run the _extract_pkg.bat script. You should get the 'Image extract succeeded' message;
10) Run the tools\ArchiveExplorer.exe, open pfs_image.dat in dump\pfs dir,
select all files, and extract selected files into the app folder.
Wait until the end of the process (this can take a long time)!
11) Copy (overwrite) dump\app\* files into the app folder
(take care of the 7-c-??? files paths too)
12) Copy (overwrite) dump\appmeta\* files into the app\sce_sys folder;
13) Run the _gen_gp4.bat script. You should get the 'Done.' message and
CUSAxxxxx.gp4 project file;
14) Open CUSAxxxxx.gp4 in Fake PKG Generator and build your .pkg project;
15) Run PS4HEN payload, install and test your .pkg;
16) Profit.

Paths (for reference):
Code:
/user/app/CUSAxxxxx/app.pkg                  --FTP--> dump\pkg

/mnt/sandbox/pfsmnt/CUSAxxxxx-app0-nest/pfs_image.dat --FTP--> dump\pfs            --A_E--> app

/mnt/sandbox/pfsmnt/CUSAxxxxx-app0/eboot.bin         --FTP--> dump\app            --CPY--> app
/mnt/sandbox/pfsmnt/CUSAxxxxx-app0/sce_module/*       --FTP--> dump\app\sce_module --CPY--> app\sce_module
/mnt/sandbox/pfsmnt/CUSAxxxxx-app0/???                --FTP--> dump\app\???        --CPY--> app\???

/system_data/priv/appmeta/CUSAxxxxx/*             --FTP--> dump\appmeta\*      --CPY--> app\sce_sys\*