The PSP Coders Liquidzigong and Coldbird released a new Custom Firmware for every PSP.
6.35 PRO-B3 is very useful for PSP 2000 88v3, PSP 3000, PSP 4000 and PSPgo.
This CFW has also a RecoveryMenu, VSHMenu, PSX Support and a ISO Loader.
New Debug Type Regions are added and some bugs are fixed.
Download: 635PRO-B3[!] Fix cache bug does not generate ISO
[!] Some bug fixes recovery menu
[!] To improve the list of compatible plug-ins to support non-standard written
[+] Improved recovery menu display, plug-ins support 100 + more
[+] Add Toggle USB recovery menu
[+] Add recovery menu deception region Debug Type I / II
Download: 635PRO-B3 FastRecovery