CFW 5.50 Prometheus Released (Firmware)

This is for PSP-1000 and PSP-2000 (non-TA088v3) owners,no more  patching.You’ll need to be running CFW 5.50 GEN-D3 or GEN-D2 in order to run it.
To install 5.50 Prometheus, copy  the extracted archive directory to ms0:/PSP/GAME and run  it from the XMB, like any other homebrew. The required files to run 6.20-required games will be copied to the appropriate spot and then you’re all set.

Download
Source: http://www.psplimhacks.com