Downgrading 3.52 to 1.50

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I took the unit back to Best Buy and exchanged it but the new unit had 3.51 on it. I figured 2 PSPs are better than one so I picked up a use unit with 3.03 on it and I've got 3.52M33-4 running now. After a little sleep I'll jigkick a battery and get the new PSP on M33 too.

Looking though the forums it appears someones figured out how to restore the keys and go back up to 3.52 official.

Now it's time to really see what the PSP can do