Updating The PSP System Software to 6.60 / 6.61 - pspunk
全PSP対応 Infinity 2.0 by Davee | 大人のためのゲーム講座
Risen from the dead: PSP Firmware 6.61 is now available! - Wololo.net
Infinity 2.0 released for the PSP, allows for persistent CFW on all models of PSPs on 6.60 and 6.61 | GBAtemp.net - The Independent Video Game Community
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
Sony PSP receives random firmware update - SlashGear
全PSP対応 Infinity 2.0 by Davee | 大人のためのゲーム講座
Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available
How To Update Any PSP To Official 6.61 In 2018! - YouTube
Complete Guide to PSP Custom Firmware | ReviveToday