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
How to Install Custom Firmware (CFW) on PSP 1000 and PSP 2000
PSP: Custom Firmware M33 source released for popular tool's 10 year anniversary - Wololo.net
PSP: Custom Firmware M33 source released for popular tool's 10 year anniversary - Wololo.net
UPGRADE ANY PSP CFW 5.00 M33 TO CFW 6.60 ME-2.3 [ PSP 1000 ] No TA-082 - YouTube