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ok im trying to help a friend downgrade back to 3.55 from 4.30 rebug so he can dump his eid root key but every time he tries to install the 999 downgrader via storage from xmb it just says data is corrupted (yes i i did PS3/UPDATE/PS3UPDAT.PUP) and i even tried from recovery menu same data corrupted i went to rebug toolbox and it says qa flag is enabled any tips or anything to help thanks in advance