PSP developer Yoshihiro has released  XGEN UPDATER DC + UPDATER + testing tool.
Here is a description of the release from Yoshihiro:

Quote:This tool let you install the firmware 5.50 GEN-B2 Full directly without any patch
and on any psp so PSP fat and psp slim TA-79 > TA-88V2 from any custom firmware or kernel exploit .
for the firmware 5.50 put your 5.50 updater on root of your memory stick renamed 550.PBP .
you can use it to restore any official firmware too on slim and fat .
you can use it to install install any TT's firmware on fat psp you need to put your eboot.pbp
on roots of your memory stick like that X:/EBOOT.PBP .
you can also converter your old DC8 magic memorystick in shiny 5.50GEN B-2.
just select in the XGEN option Install XGEN pandora and restart your psp don't forget
to put the 5.50 eboot.pbp updater on root of your ms renamed in 550.pbp.


to bypass the battery check please connect your AC cord.

Yoshihiro PSP XGEN UPDATER FOR PSPGEN CFW 5.50GEN B-2
use it at your own risk