read the pdf, if its not there google it
this link explains it all
from ps3 news
http://tinyurl.com/22qmsuj
its been posted before ?
http://www.ps3hax.net/showthread.php?t=8584
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cfw 3.55 > OFW 4.25 due to some noob who wanted to play f1 2012 :(, rendered it useless as well as that 500gb inside.