http://www.dcemu.co.uk/vbulletin/showthread.php?t=49967
Download this, put it were it says.
Then get the 1.50 firmware file, call it UPDATE.PBP.]
Put it in the recover folder.
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Go into recovery mode, and run it.
"Run program as /PSP/GAME/RECOVERY/EBOOT.PBP"
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