reset 1.51

[Gazmec]

Hi I wanted to ask you all the following question. Thank to this site and all of you I now know what version of psp by looking at the box. I found a second hand 1.51 version but owner had upgraded to 2.60. What I like to know is there a way to reset it back to 1.51firmwire.

[yaustar]

if you are on 2.01 or higher, you cannot downgrade.