NOTE: THIS PROGRAM MIGHT BRICK YOUR PSP!!
YOshihiro released a beta downgrader u can download it here: http://www.yoshihiro-dev.com/downeze...rader_Beta.rar
U can see what he sais (in french someoene translate it plz) here:
will it work? \
EDIT [Mod]: The following file is Yoshihiro's progress on the downgrader and will not downgrade your PSP. This is just a file of his progress and allows other willing developers to work on it
The following is an excertBad translation)
Hello has all. yes same you labas which still insulted me this morning I say to you too hello. Aprés all they is stories has the idiot I will say to you how downgrade and as I cannot finish it for reasons personnel and much of wab. and I hold excused me of all this brothel the downgrader did too much noise.
the premiere solution with which the video ones were made is simple but blocks has the 3ém checking .
I directly give you the eboots and I would explain you how fonctione method 2.
1: Thus one veiled arrives there had you need for 2 memory stick and the preparer with els two file which this finds in the rar. all that this finds in MemoryStick1 go on the ms1 and all that this finds in MemoryStick2 go in the ms2.
2: Veiled the method to break the 2ém lock of updater. it is necessary for you to launch the first eboot on your psp 1.51, 1.52 or 2.0. you will see white screen and as soon as the white screen passes to the black press 3 times power so that the psp passes in hibernation mode veiled you deadened your psp take your temp and to replace the premiere memory stick leaves the memory number 2. as soon as all ets ok re-press power for sortire hibernation mode. psp load update correctly and say you that update 1.50 is prete has demarrer as if which had were launched over 1.00 . veiled and it blocks it is the derniere checking quil has there on update. one has to advance aprés that well but work remains secret.