http://www.maxconsole.net/?mode=news&newsid=7603
Quote from Maxconsole.com:
QUOTE
A talented team have been hard at work on a custom flash replacement for the PSP, which will not only allow you to use homebrew files and run unsigned code on the PSP but will also allow you to enjoy the quality features built into all Sony PSP firmware revisions, right up there to the current v2.71 firmware! The team behind the Epsilon BIOS have completed cracked the encryption methods and developed the OS hacks to run unsigned code and even in kernel mode. The team have been unable to release this previously due to the lack of a modchip for the PSP, but with the much talked about Undiluted Platinum PSP mod just around the corner, a dream can now become a viable reality! The Epsilon BIOS will be released soon.