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Install PSP Custom Firmware 5.03 Prometheus add-on

If you had 5.03 GEN-C and you’ve probably experienced having problems playing games with Sony’s new DRM which requires 6.20 OFW. Luckily, Liquidzigong created Prometheus Module so that users with 5.03 GEN-C (meaning COMPLETELY hackable PSPs) can still enjoy the latest game releases without any patching involved. With this guide, I’ll be showing you how to install the 5.03 Prometheus firmware add-on .

For ease of identification, Liquidzigong says you can also call this release as 5.03 Prometheus Add-on

Important: This only for hackable PSPs. Not sure? Read: Is my PSP hackable?

Update: The Prometheus-3 add-on is now available.


  • A PSP with custom firmware 5.03 GEN-C installed. If your firmware version is below this, please update to 5.03 GEN-C.
  • PSP battery that’s at least 78% full
  • Download:
  • Disable ALL plugins.
  • Back up your save files (so that if they get corrupted, you still have backups)

How to install 5.03 Prometheus add-on

  • Connect your PSP to your computer
  • Extract the to your PC
  • Copy the 5.03_Prometheus folder to X:/PSP/GAME/ on your PSP’s memory stick. (Where X is the drive that your PC recognizes your memory stick)
  • On your XMB, go to Game > Memory Stick, hold the L trigger and press X to start 5.03 Prometheus Updater
  • Continue to install the official 5.03 Prometheus CFW when prompted
  • After all process is complete, press X again. Your PSP revert to the XMB screen.
  • Congratulations, you’ve just installed 5.03 Prometheus add on on your 5.03 GEN-C.

Important: This release is currently 5.03 Prometheus v4. Stay updated by subscribing to our feeds.
Update: The Prometheus-3 add-on is now available.
After installing 5.03 Prometheus, How about some Free PSP Games?


In case of problems you can go back to 5.03 GEN-C by simply running ChickHen R2 then 5.03 GEN-C again.

You can post problems you’ve encountered here.

Developer Notes

  • Repair 2000v3 not work problem.
  • Check adding firmware 5.03 .
  • Analysis of the custom key file restoration process in the small problem .
  • Fix crash when unloading the issue , amendment reboot show .
  • Uninstall the original version of file recovery 5.03 .
  • After the MAC address MAC fix hidden display for the gaps .
  • Brush the former increase the frequency to 333/166 .
  • Prometheus module and has been used to improve the game ‘s compatibility
  • Optimize application performance and size
  • Amendment SysMemUserForUser_91DE343C possible problems


Liquidzigong – Prometheus Module

Genyus – By GEN

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