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January 5, 2011 // 6:40 am - Today PlayStation 3 developer KaKaRoToKS has released the first PS3 Custom Firmware alongside a video of it in action below!

With KaKaRoToKS PlayStation 3 Custom Firmware, users can now run PS3 homebrew 3.55 signed packages (currently doesn't support PS3 game back-ups) via 'Install Package Files' on non-JailBroken PS3 consoles and access PSN for the moment.

Download: PS3Tools / PS3UPDAT.355Cfw.KaKaRoTo-1.3.pup (Removed app_home from XMB) / PS3UPDAT.355Cfw.KaKaRoTo-1.2.pup (More game_tool2.xml Fixes) / PS3UPDAT.355Cfw.KaKaRoTo-1.2.pup (Mirror) / PS3UPDAT.341Cfw.KaKaRoTo-1.2.pup / PS3UPDAT.355Cfw.KaKaRoTo-1.1.pup (Fixes Missing Game Data XMB Icons) / PS3UPDAT.355Cfw.KaKaRoTo.pup / PS3UPDAT.355Cfw.KaKaRoTo.pup (Mirror) / PS3UPDAT.341Cfw.KaKaRoTo.pup / PS3UPDAT.341Cfw.KaKaRoTo.pup (Mirror) / PS3 Category Game XMLs / GIT / PS3 Keys / PS3Keys GIT

Note: DO NOT try to install this from the service mode, it might brick your console, install it normally from the normal menu or the recovery menu. Regarding PS3 back-ups with CFW, from IRC: the payload currently remaps the Blu-ray to USB or internal if a back-up manager calls for it meaning don't expect support for them unless someone else adds it.

Additionally, Waninkoko has now updated FWTool for PS3 Firmware (not application) PKG files and it now decrypts, encrypts and signs properly.

To quote from his site: Great news! Thanks to the tools made by the fail0verflow team (and thanks to sven in particular for his work on the pkg/unpkg tools), the first “Custom Firmware” is now available for the PS3!

I see a lot of questions coming up really fast on my Twitter account, so here are the basic things you need to know :

Because of legal/copyright issues, I will not provide the custom firmware to anyone, however, I’ve made available all the tools necessary to transform an Official firmware update, into a custom one, just grab my ps3utils repository from github, compile, then run :


This will take the official firmware, unpack it, modify it, then repack it correctly (requires you to install ps3tools).

This requires Linux of course, but I’m sure others will do it for the masses and illegally release those files somewhere.

The advantage here is that you can do it for any firmware, if you want to keep version 3.41, then give it the 3.41 update, if you are on 3.55 already and can’t downgrade, then run the script on the official 3.55 firmware and it will create a modified 3.55 firmware.

You can put the file in a USB drive under the filename “PS3/UPDATE/PS3UPDAT.PUP” and then go to system update in the XMB, and it will allow you to install the update (even if you’re already on 3.55).

People are asking what are the features of this firmware, it’s simple, all it does is to add those “Install Package Files” options to the Game section of the XMB. It doesn’t do anything else!

This firmware will not allow you to run the currently available homebrew application. Once the homebrew developers re-package their files in a ‘retail’ .pkg format with signed executable, then it will work (this should be coming soon thanks to the work of the fail0verflow team).

Since the kernel is left unmodified, this means that this custom firmware is really meant for future homebrew installation, and it will not allow piracy. I plan on keeping it that way.

This is just the first attempt at custom firmware, and it only contains a minor modification to allow you to install pkg files directly, eventually we’ll get some more options added to it in the future. This is just starting to get interesting!

p.s: Thanks to everyone who helped make this possible!


Brief guide:

1. Download ps3 utilities and ps3 tools from github / team fail0verflow:

git clone

cd ps3utils
cd ..
git clone git://
cd ps3tools
cp pkg unpkg ../ps3utils

2. Grab the PS3 encryption/decryption/signing keys from github:

git clone ~/.ps3

3. Download PS3 3.55 (or whatever official firmware PUP)
4. Extract and copy “PS3UPDAT.PUP” to the “ps3utils” directory
5. Create the PS3 Custom Firmware (CFW) from the original/official update (OFW):

cd ps3utils

6. Copy and rename CFW.PUP to a USB storage device keeping this directory structure in mind: /PS3/UPDATE/PS3UPDAT.PUP
7. Connect that USB device to your PS3 and install from Settings -> System Update

If you’re currently running 3.41 (or earlier) you can either remain there and create a specific CFW PUP for that version, or you can upgrade to a later PS3 firmware version, like 3.55 for example. It’s whatever original PUP file you use — only you cannot flash a version lower than the current version installed on your PS3.

So if you’re already at 3.55, where you’re unable to downgrade, then for the moment you have no other choice but CFW (or OFW) 3.55. 3.41 on the other hand: upgrade or create CFW 3.41 and for the interim you’re still able to jailbreak and run unsigned homebrew. Other things to note:

1. This CFW does not modify the kernel in any way, meaning all the current compiled homebrew out there will not install or run using “Install Package Files” from the XMB.
2. With the above point in mind you should know this CFW does not enable backups - straight homebrew.
3. Current PS3 homebrew and new homebrew will need to be “retail” packaged and signed; that’ll happen with fail0verflow's tools.
4. This is only the beginning.

Video: KaKaRoToKS Releases First PS3 Custom Firmware!

Video: KaKaRoToKS Releases First PS3 Custom Firmware!

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#193 - Brenza - January 8, 2011 // 12:46 pm
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Nice, but do you know how can we sign homebrews? Do you've a guide?

Thank you for 1.3 version.

Can someone make it also for 3.41??

#192 - psp1mp - January 8, 2011 // 10:56 am
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as annoying as it gets, theres no way to avoid it. but you can always tell them to try it out, that's how we all do it, its how the modding scene works, after all, right?

that way they can cry to themselves when they brick their systems because they didn't research first.

#191 - BwE - January 8, 2011 // 2:45 am
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i'm getting tired of all this.. sure its good to have new users. but not to go "can it play backups"

just wait i suppose... thats what i'm doing.

#190 - lordfenixnc - January 8, 2011 // 2:22 am
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they have a Fix for the Bluray Mess up... so as long as you dont brick ur system or something you should be fine.

If you have a newer ps3 you may not be able to downgrade.. unless something new just happened and i missed it :/

#189 - JonoEfthy - January 8, 2011 // 2:02 am
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Quote Originally Posted by Darkestshadow View Post
No leave it on 3.50 then you can downgrade to 3.41 so you can jailbreak.

yeah but then id have to spof a higher firmware for some games, and also i heard downgrading ****s your bluray player for movies...

but yeah i guess putting it on 3.41 where all the homebrew currently is makes sense, thnx

#188 - Darkestshadow - January 7, 2011 // 8:25 pm
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No leave it on 3.50 then you can downgrade to 3.41 so you can jailbreak.

#187 - JonoEfthy - January 7, 2011 // 3:40 pm
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i have 2 ps3's 1 on 3.55 (i don't want to jb or cfw) and one on 3.50 (i DO want to jb), i have an x3max coming in the mail, if i updated to 3.55, then used this custom firmware, will i be able to jailbreak the ps3 using the x3max that will probably have the code loaded to jb 3.41?

so basically i'm asking can i jb a ps3 on cfw 3.55 using the 3.41 jb?

#186 - Stevolab - January 7, 2011 // 2:34 pm
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Quote Originally Posted by fromzero View Post
That's pretty not smart. Gamestop has a 7 day return policy on used games. Buy a game, back it up, exchange it within 7 days. Back it up, exchange it within 7 days, repeat until library is complete, return it within 7 days for FULL REFUND. Total cost $0

If you want to send up a red flag at gamestop... who's to say they don't report any suspicious activity to anyone? At least my way i have a little less chance of someone wondering why i'm going through so many games.

One guy i used to get my xbox games off of did the same thing... he got busted for selling hot xbox's because games he'd buy and take back the next day got someones attention. to each their own...

#185 - wick40 - January 7, 2011 // 8:42 am
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Thank you very much for this fast answer !

#184 - PS4 News - January 7, 2011 // 8:41 am
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No, the KaKaRoToKS CFW does not allow the playing of PS3 game back-ups... no PS3 CFW does yet, so you will have to use the JailBreak methods to do that at the moment.