Sacado de psp-spot
http://www.psp-spot.com/forums/index...howtopic=23353 , y según comentan aprovechando la vulnerabilidad del GTA y dice así:
Today marks a new Day in History.
Team 25K, working with no other than AlonEtriO from the original WAB Team have been working Day and Night, in order to bring you all a Working 2.6/2.5 to 1.5 Downgrader.
The SonyDG 0.01a[beta] is pretty complicated for a n00b, but any one who is familiar with the GTA exploit on 2.5 and 2.6 should not have a problem at all...
Read Me:
=======================================
Thats right f*ck heads. 2.6 / 2.5 Downgrader is here!
Took days, but manage to sort sh*t out.
We would like to thank all who stuck behind my man AlonEtriO, through all this shit with SxT
How to work.
Un-zip files to desktop [should be 9 total]
Place Folder .DG FILES is ms/:root
Place GTA game save file in psp/savedata folder
Place update [1.5 FW] in Game section
Start up GTA as normal. When it has loaded, select "Load Game", select the DG_0.1a[beta] savegame and confirm the load as normal. After a short delay, the Downloader should start.
Follow on screen instruction and MAKE SURE your power cord is plugged in and your battery is 99-100%
The Downgradr will fail at 99% and then restart, congrats now you have a 1.5!
tested 11 and all downgraded great!
TEAM 25K and AlonEtriO [only]
========================================
NOW THE DISCLAIMER:
WE HERE AT PSP-SPOT.COM TAKE NO CLAIM THAT THIS WILL INDEED WORK 100%
BY DOWNLOADING FILE YOU AGREE TO TAKE FULL RESPONSIBITY FOR THE OUTCOME
OF THIS FILE. IF YOUR UNIT SHOULD HAPPEN TO 'BRICK' PSP-SPOT.COM IS NOT
RELIABLE. USE THIS FILE AT YOUR OWN RISK!
Download file inside thread
http://www.psp-spot.com/forums/index...pe=post&id=275
----------------------------------------------------------------------
Yo tengo 1.5, y por supuesto no lo he probado, pero en el foro de psp-spot ya hay respuestas dando las gracias. Tampoco se mucho inglés, así que no me pregunten como realizar el downgrade. Pero seguro que alguien enseguida lo aclarará.