I have successfuly downgraded my Sony Playsation Portable from version 2.1 to 2.0!.... then downgraded from there....
You may not beleive me what ever i tell you but i will tell you how i have done it never the less.
I unpacked an eboot 2.0 and did the predictable change of numbers etc... from 2.0 to 2.7... I have aquired sony's signiture from a *friend* to complete this.
I have loaded the eboot (the one that thinks its 2.7 but realy is 2.7)
Dont ask me why but when it gets to 99% just like on the 2.0 downgrader it has an error apear.
Thanks for looking
I will release this eboot as soon as it has been fully tested.
Kind Regards
Richard Bru


P.S. I have took a few VAGE pictures which should show you it in action i am not saying that they are (FACTUAL), i will make a video as soon as i have a webcam or an ipod thing.

Pictures=
The EBOOT 2.7= http://img466.imageshack.us/my.php?image=psp2773fx.jpg

The Unsigned EBOOT error= http://img466.imageshack.us/my.php?i...sperror8wq.jpg

The EBOOT with the signiture on it (Loading).... http://img466.imageshack.us/my.php?image=psp273lh.jpg

The completed job... the PSP downgraded from 2.1 to 2.0 then to 1.5!= http://img466.imageshack.us/my.php?i...therpsp2la.jpg