157w ago - Update: According to several members (including jensen76, evilsperm, and sk group) when you downgrade a PS3 with the Modified 3.41 PUP (below), it currently cripples the Blu-ray player functionality. Some additional PS3 Blu-ray fix updates are outlined HERE, however, a more stable solution is still being worked on.
To quote from garyopa on one work-around: "I was able to restore one machine I had, by copying over all the files I had in the /dev_flash2 and /dev_flash3 back to the HDD, that I had saved before when it was on v3.41"
Forum member p666 also has expanded on the PS3 Blu-ray fix a bit HERE...
157w ago - Here is a guide I wrote on how to convert your Demo / Kiosk PS3 into a fully functional Retail PlayStation 3 console via JailBreak using PSGrade (or similar) so that so you no longer need to enter PS3 Demo Unlock Codes in.
157w ago - Since the release of PS3 Firmware v3.55 there is no sense in keeping the master key a secret any more - it has been released, along with unencrypted payloads, and a promise to release the source-code by PS3YES for a free PSGrade PS3 downgrader.
In related news, graf_chokolo has now detailed how to decrypt PS3 PKGs as noted HERE.
To quote: Today he's shared his work with the public, however, it still requires some work, before it is fully functional. Right now, his code still requires the dongle master key, one that is buried within the PS3 console. The good news, is zAxis feels this key can be retrieved via a 3.15 fw console.
He is asking the community, anyone with a 3.15 console, to help retrieve this key. Once retrieved, PSGrade should become fully functional. Below, is his request to the public.