a note for English people :Originally Posted by MaverickHunterX
I offer my sources to you so that you can continue the project
Method 1 :
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First step:
you need two memory stick and both file which is in the rar. all what is in
MemoryStick1 goes on the ms1 and all that is in MemoryStick2 goes in the ms2
second step:
method to break the second lock of the update.
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 three times power so that the psp is put in hibernation mode, your psp
sleep, take your time and to replace the first memory stick by the memory
number 2. as soon as all and operational, re-press power to leave the
hibernation mode. the psp load update correctly and tell you that update 1.50
is ready to start, exactly the same thing that the 1.00 th psp will block it
is the last checking which there is on update.
Metho
Method 2 :
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it is a MD5 in eboot.pbp program of update, if you modify any byte of updater it will be launched but under
the PSP OS UPDATER you will have pretty a message that your update is corrupt and cannot be launched,
this MD5 is so large and visible that nobody speaks about it. It is placed at the last line of Eboot below
the psar it is thanks to that which Updater verified that Eboot was never modified. This md5 is not
in the updater of UMD Game a small hard question? . the answer is because Sony knowledge very although
the umd' S are not thus copied they did not add a security for verifier if the psar were modified.
I did not find yet how to calculate this md5 and to find to what it corresponds.
But him only is clée. the last thing for Executable updater umd as the 2.0 they are completely identical
to that which functions since the memory stick but they are signed differently with a
special flag UMD thus for the psp that is impossible to launch it since the memorystick
Cordially,
Yoshihiro
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