Since you said that you flashed a CFW into that PSP, I'll assume that it does not have a TA-88v3 mainboard.
Originally Posted by keropi666
Unfortunately, the best firmware for those consoles is still... 5.50 GEN-D3 final.
Installing Prometheus-3/Prometheus-4 will make GEN-D3 final a lot better.
With Prometheus, it can run games that need up to firmware 6.31 for Prometheus-3, and up to 6.35 for Prometheus 4.
However, Prometheus-4 is unofficial and doesn't work *properly* on all consoles.
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