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There is a reason Sony never released these .PUP files to the public. Installing an exclusive firmware is akin to performing open-heart surgery on your PS3 with a butter knife. The dangers include:
To the modding community, PS3UPDAT.PUP is the Holy Grail. Decrypting it reveals Sony’s internal development artifacts: firmware ps3updatpup exclusive
In 2010, fail0verflow demonstrated that by modifying PS3UPDAT.PUP, re-encrypting it with a stolen (or derived) key, they could run unsigned code. The result was custom firmware (CFW)—the ultimate exclusive: a PS3UPDAT.PUP signed by you. There is a reason Sony never released these
The keyword "exclusive" in the context of ps3updatpup refers to firmware builds never released to the general public. These fall into five primary categories: fail0verflow demonstrated that by modifying PS3UPDAT.PUP