What's your PSP's model?
Originally Posted by Xellos
If it's a slimline, you might want to try the 6.37 ME CFW.
Otherwise, you should just upgrade to 5.50 GEN-D3 final and then install the Prometheus-3 patch on it.
If you are bold enough, try the Prometheus-4 patch.
But that patch breaks some games on my PSP-1006 console.
Unmodified SCPH-77006 with SM 3.6
SCPH-39006 with M-chip modchip, SCPH-10281 NA and refurb Seagate 80GB HDD
SCPH-10000 v1.00 with SCPH-10190 PCMCIA NA and SCPH-20400 HDD unit