国外有大神实现了楼主的需求,不过貌似挺麻烦。
Following their PS4 1.76 Database Mod, today the PlayStation 4 modders at e✘treme-Modding.de shared a PS4 4.05 database mod to run installed Fake PKGs on USB or BD with a demonstration video below!
image:
https://imgsrc.baidu.com/forum/pic/item/f4e5fbc4b74543a966a3760015178a82bb0114ba.jpg

Here's the details from their blog, to quote: If you want to play your installed Fake PKGs on USB or BD you just have to copy a few files and edit the Database. It's nothing new but now with a detailed tutorial for 4.05 users.
Of course it's not hard if you understand how the Database work, just follow the steps of my Tutorial below.
PS4 4.05 Mod - Run PKGs on USB or BD
Tutorial for USB method:
1. Enable Debug Settings and install all Fake PKGs you want to play
2. Connect your PS4 via FTP to your PC and dump the Database (/system_data/priv/mms/app.db)
3. Copy the app folder (/user/app) to your USB device and rename it to GAMES
Or you can create the GAMES folder on the USB device, add the ID folder (CUSAxxxxx), rename the pkg (you have installed and which is already on the USB device) to app.pkg and move it in this folder (/GAMES/CUSAxxxxx/app.pkg).
Database Mod:
Now you have to edit the app.db to change the path to your app.pkg on /GAMES/CUSAxxxxx
Example (CUSA03842):
1. Change _org_path (/user/app/CUSA03842) to /mnt/usb0/GAMES/CUSA03842
image:
https://www.psxhax.com/attachments/ps4-4-05-database-mod-to-run-installed-fake-pkgs-on-usb-or-bd-png.3644/

2. Copy your modified app.db back via FTP (/system_data/priv/mms/) and restart the PS4. Now you can run your Games on USB.
If you want to run a PKG on a BD Disc you have to burn the app.pkg to a writeable disc (/GAMES/CUSAxxxxx/app.pkg) (only tested with a bd-rw). The _org_path for the Database is /mnt/disc/GAMES/CUSAxxxxx.
Cheers to both @Drudess and @seanp2500 for the heads-up on this in the PSXHAX Shoutbox earlier tonight!
image:
https://www.psxhax.com/styles/default/xenforo/clear.png

image:
https://www.psxhax.com/attachments/ps4-4-05-database-mod-to-run-installed-fake-pkgs-on-usb-or-bd-jpg.3643/

Read more at
https://www.psxhax.com/threads/ps4-4-05-database-mod-to-run-installed-fake-pkgs-on-usb-or-bd.3912/#gQ76FIPYGFBdCtMC.99https://www.psxhax.com/threads/ps4-4-05-database-mod-to-run-installed-fake-pkgs-on-usb-or-bd.3912/