I recommend the 2.5/2.6-1.4 FULL downgrader which can be found on PSP Hacks · Hacks, Cracks, Mods, Homebrew, Utilities · Hack Sony Play Station Portable

worked realy easy for me. just follow the instructions on the screen.the only downside with this method is that you've got to have a nonpatched GTA LCS for it to work.


but it's really easy once you've got all you need.

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