- PSP Updates have posted this earlier:
"Rumors have been flying around of a Firmware v1.50 -> 1.00 downgrader for the PSP. For those of you who don't know, the original PSPs which were sold in Japan came with Firmware version 1.00 which doesn't require any digital signed Sony signature to run homebrew. If a downgrader to 1.00 is created successfully, this could open the doors to custom firmwares that could allow for both the features in the newer versions (2.00, 2.50), as well as running homebrew.
Please also know that there have been some reports of users bricking their PSPs while using this downgrade method. Hackers are speculating that only virgin 1.50 PSPs (PSPs that have never been upgraded/downgraded) will be able to successfully downgrade from 1.50 to 1.00. To put it another way; If your PSP was bought in the store as a 1.50 and has never been upgraded to 2.00 and then downgraded back to 1.50, the downgrader is reported to work. Of course all of this is still speculation, so please approach this with caution! We will keep you posted immediately as more information surfaces."