Infinity 2.0 released for the PSP, allows for persistent CFW on all models of PSPs on 6.60 and 6.61 | Page 2 | GBAtemp.net - The Independent Video Game Community
VERY EASY) Install Custom Firmware 6.60 PRO B10 PSP 1000, 2000, 3000 + DL - YouTube
Updating The PSP System Software to 6.60 / 6.61 - pspunk
Complete Guide to PSP Custom Firmware | ReviveToday