Installing Custom Firmware on a PSP : 9 Steps - Instructables
HEN & Half Byte Loader PSP latino Official - Custom Firmware 6.20 PRO-B9 Custom Firmware 6.39 PRO-B9 Custom Firmware 6.60 PRO-B9 No hace mas de una semana que salio el firmware 6.60
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Bright Blog - LCFW6.60/6.20/6.35/6.39PRO-B9リリース(正式版)
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How to Hack/Install 6.60PRO-B9/PRO-B10 Permanent & Semi-Hack (PSP 3000, 2000, 1000 & PSPGo!) 720i HD - YouTube
PSP 6.60 PRO - B9, B10 CFW installation [Very Easy] (PSP 3000, 2000, 1000 and PSPGo) - YouTube