Chinese hacker liquidzigong has just released an updated Custom Firmware Prometheus-2 version. You need a PSP-1000 or PSP-2000 non TA088v3 and running either the first Prometheus Custom Firmware released or Custom Firmware 5.50 GEN-D3. This update has added support for games that require original firmware 6.30 in order to run.
This isn’t to be confused with 5.50 Prometheus v2 (Released in June) As Prometheus-2 has 6.30 OFW support, v2 doesn’t!
Source: A9vg
Instructions for installation:
Make sure your on 5.50 GEN-D3 (Download below)
Install the Custom Firmware 5.50 Prometheus-2 to your MS PSP/GAME/
Run the installer from the XMB and then hit X to start the installer
