From the included ReadMe file, to quote: INTRODUCTION
For years, the security system of PS3 remained unbreached because Sony had a very good defense mechanism: Consumers could use it for more than just gaming by installing Linux via the “Other OS” feature.
Therefore there was little motivation for security researchers to investigate the PS3. However, then Sony (or SCE, SCEA, SCEE or whatever, we aren’t exactly sure what is going on there anymore) made an unprecedented move:
Not only did they introduce a new PS3 model that no longer allowed the installation of an Other OS, but with a firmware “upgrade” they removed it from previously sold consoles.
While removing advertised features from a product (several years after its purchase!) is blatantly unlawful, having highly paid lawyers apparently allows you to get away with it- in a legal sense.
But when the law fails to protect the people, then some of those people, being clever and resourceful, help themselves. And that is what happened here. Sony sunk its own battleship.
PS3MFW is the next step in the process of returning to consumers control over their own hardware. Your PS3 belongs to you. You didn’t lease it, and you signed no contract when you purchased it. It is your right to use it however you choose. It is your responsibility to do so within the legal boundaries.
PS3MFW allows you to tailor your PS3′s firmware to your specific needs, giving you a level of control you previously lacked. PS3MFW is open source. That means it is completely transparent, and anyone with the necessary programming knowledge can help to improve it and create new plugin tasks.
It is with great pleasure and joy that we are now able to present you with the first public release of PS3MFW Builder. A lot of hard work went into this during the past five weeks, by some incredibly dedicated and inspired people. We would like to thank everyone who contributed, the people who got this project underway, and those who did all the programming and testing.
PS3MFW Builder v0.1 has been successfully tested on all major PS3 hardware revisions, and in conjunction with OFW 3.10 – 3.55. It is NOT compatible with OFW 3.56.
Remember that this is only the very first release of PS3MFW Builder, version 0.1. With your support and feedback, we intend to create the definitive PS3 firmware solution that makes all other closed-source custom firmwares obsolete.
PS3MFW Builder is not distributed with any program code copyrighted by third parties.
in the parent directory that ps3mfw installed to, there will be a "ps3keys" directory. the keys go in there. as for the tools... well, there is a tools folder within the ps3mfw directory, but it already has the tools in it on a windows installed version.
It's fine here, but sometimes people's PCs have different file extensions blocked or open partially (automatically) with another application. Here is the Windows version as a .zip instead of a .rar file for you to try.