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Disabling tivoization is possible on: When a PSP is turned on with a battery (no sector), and when the battery's serial number is 0xffffffff, then it boots on the memory stick.
This is similar to booting from a CD-ROM instead of the hard-disk on a PC.
Steve Mc Donnell's experience running businesses and launching companies complements his technical expertise in information, technology and human resources.
He earned a degree in computer science from Dartmouth College, served on the Worldat Work editorial board, blogged for the Spotfire Business Intelligence blog and has published books and book chapters for International Human Resource Information Management and Westlaw.
The only requirement is that your PSP has to run a supported firmware (6.20, 6.39, 6.60 or 6.61), but that can be done by the build-in wireless system update feature, which will let you install the official system software 6.61.If you want to flash your PSP, you usually had to use a USB connection or a card reader to put the Custom Firmware files onto your memory stick, since the PSP is usually unable to properly download them itself. It is now possible to download & install a PSP Custom Firmware directly onto your PSP.