Custom firmware 5.00 M33 released for PSP | Tech Ticker
M33's CFW 5.00 M33-3 on PSP-2000 series | LifeDrive
Found my old 1000 going to restore it back to its former glory! : r/PSP
Here's my PSPs, top i bought back in 2008 modded and still on 5.00m33-6 but it's missing the kratos battery cover the other my brother got it for me for xmas this
PSP: Updating from the 3.xx OE CFWs to the 6.60 ME CFW - YouTube
PSP: How to Upgrade from 3.60 m33 to 3.71 m33-2 Custom Firmware - YouTube