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1. Download the 3.41 firmware
   
2. Open it in HxD
   
3. Find=>Replace 3.41 to 3.50
   
4. Copy onto USB
   
5. System update from USB on PS3.
   

I can confirm it does detect the firmware, but I have not done the "Update to 3.41" Yet because i've been busy.

Try it.

And do not be saying any crap about Signing it. We have the PS3 Masterkey, let's do it ourselves.

Does not work. No we cannot resign pup packages (yet)