no the PS3 can not go backward to an earlier configuration after an update like you can a pc
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You can't, even with the battery.
definitely no the best u can downgrade without a Pandora battery is 3.03.... what you can do is use the Pandora battery to downgrade and the results will be great I've done it on my psp and when i downgraded my psp i got to download as many games that can fit into my psp(full games of course) so downgrade your psp using a Pandora battery:)
You can't.
You can only get cfw without a Pandora if your psp is firmware 5.03 or lower and you use the program chickHen to do so.
No, you must have at least 3.52 M33 Actually you can, assuming you have Official firmware 1.50 on your Psp and have installed Devhook. Even if you have devhook you can only play ISO's that devhook can support (up to 3.03).