Upgrade
PSP: How to Upgrade from 3.60 m33 to 3.71 m33-2 Custom Firmware
When upgrading and downgrading you need to have at least 78% power in the ps
Download 3.71 m33 install :Here or download from megaupload
Download m33update2 :Here
How to Upgrade 1.50 Firmware PSP to Custom Firmware 3.52 m33
Please follow the video the subtitles timing can be off sometimes.
Download 3.52 m33 MH :Here
or download from Megaupload Megaupload