i found how to make you psp 2.5/2.6 roll back to 1.5.

1st goto you psp and get the firmware version on the screen.
2nd take a picture of the screen.
3rd delete the 2.6 or 2.6 and relace it with 1.5 with photoshop.
4th save it them post it as proof on psp 3d.
5th once thats done hide and change your user name.

at least my way works

haaa haaaa

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