You can either update directly from RC6 (online only), or update manually using the files found below.
Red Ribbon release candidate 7 is now available. It is based on Debian Wheezy and It includes the following changes:
* Kernel 3.7.1 with the Graf_chokolo's, Marcan's and Gitbrew's patches.
* New version of the installer with some features added and some bugs fixed.
* New version of the Red Ribbon theme.
* Iceweasel (Firefox) updated to the 17 release.
* Asbestos and OtherOS now will use the same kernel.
* Kboot now will set the latest kernel as the default boot option.
* Added a new tool to configure the timeout on Petitboot.
* Added support for Playstation Eyetoy.
* Added GUVCview as the tool for capturing video from the webcam.
* Gnome-Player is now the media player.
* Added a new tool to configure the PS3's video mode.
* Added support for NTFS.
* PulseAudio is now the sound server.
* Added a new volume control tool.
You can download it from SourceForge.
All the new features are available for the RC6 by installing the latest online update. You need to connect the PS3 to the internet, open a lxterminal and download the file:
sudo sh online-update-2013-01-10.sh
Unfortunately, the RSX driver is still in development.
Direct Download: red_ribbon_rc7.iso
Official PSX-Scene Release Thread: Red Ribbon: GNU / Linux for PS3
Official Site: redribbon.t15.org