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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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#153 - kingbooforums - January 6, 2011 // 4:54 am
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Quote Originally Posted by bitsbubba View Post
I know you can but I believe it needs to be JB too.

Oh... ok thanks for telling me. I was gonna ask how to JB a ipod touch but it would probablly involve me buying something and waiting lol.

I wonder how long it will be till a back up launcher is out though? I pray just a few more days but nope not likely..

#152 - bitsbubba - January 6, 2011 // 4:45 am
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Quote Originally Posted by kingbooforums View Post
I wonder if I should just buy one then. Although I hear you can jailbreak with an Ipod touch?

I know you can but I believe it needs to be JB too.

#151 - kingbooforums - January 6, 2011 // 4:24 am
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I wonder if I should just buy one then. Although I hear you can jailbreak with an Ipod touch?

#150 - jarvis - January 6, 2011 // 4:16 am
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If this is in response to my post, then you should be aware I am a professional Linux developer who did not take part in the jailbreak scene at all and has bought and will continue to buy every PS3 game I play.

With that said, I still think Sony got what they deserve. I bought the PS3 for its advertised features, which Sony then took away. I would have been less inclined to have purchased the PS3 if those features were not originally available.

I'm not trying to start a flame war and I am not looking forward to all of this progress so I can download PS3 games for free. I will continue to purchase PS3 games, but look forward to the home brew scene, as well as restoring features that Sony has since removed.

This post is short sighted, and you probably work for Sony, so I don't know why I'm even bothering with reply...

#149 - bitsbubba - January 6, 2011 // 4:16 am
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I find the title redundant, what is PS3 Acid or Rebug considered?
Quote Originally Posted by kingbooforums View Post
If I was at 3.41 would it be possible to play back ups without a dongle?

not gonna happen kingboo.

#148 - kingbooforums - January 6, 2011 // 4:10 am
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If I was at 3.41 would it be possible to play back ups without a dongle?

#147 - daveshooter - January 6, 2011 // 4:06 am
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I've just read this thread bud, and from what info I got from it was, no you can't downgread from 3.55. Sorry but it's true. don't tell anyone tho.

#146 - kingbooforums - January 6, 2011 // 3:58 am
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I have 3.55. Is it safe to install the thing from the first post? I am a bit confused. Does this downgrade you? as that would be nice.

#145 - daveshooter - January 6, 2011 // 3:55 am
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Quote Originally Posted by RevCube View Post
I'm sick of people talking about sony getting what they deserve if everyone hates sony so much why did you get a PS3? if you dont like it and hate sony then go play wii or 360. Sick of people trying to justify running bootleg games.

Everyone knows that this is 90% about piracy and 10% other reasons, sick of the sugar coating talkin about sony is getting what they deserve, ok so they took away linux SO WHAT, i'm pretty sure that 90% of the people talkin about sony getting what they deserve even know how to use linux, what a bunch a BS. Sony RULZ otherwise you wouldn't be on here checking on how to play their awsome games for free.

Well said! I've been meaning to post just the very same.

#144 - Chivafighter - January 6, 2011 // 3:36 am
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Lol yea, because we all know the potential of what this cfw (and future) can do, and will do. Most likely we will be able to run pirated games and what not, but since the introduction to the Internet feeds and how the ps3 connects to the psn and the online gaming and all of that factored in, They might have a chance to see which is a "valid" ps3 and "valid" game or not.