
GENyUS, a coder, is now back with the new update for the bug fix we found in 5.50 GEN-B2 way back. This will be applied to his latest version of custom firmware. The Custom Firmware 5.50 GEN-B2 solves some compatibility problems with the homebrew application Recovery Flasher, which is essential to Hellcat, etc.
To install this custom firmware: download the file below, and install it directly on 5.50GEN CF-B. Make sure you have this particular custom firmware less you install it on a lower version like the 5.50 GEN-A.
If your PSP has the custom firmware 5.00M33 installed in it, update the first 5.50GEN-A and then to 5.50GEN. After that you can install this Custom Firmware 5.50 GEN-B2.
Download 5.50 GEN-B2

(5 votes, average: 4.60 out of 5)
I installed 5.50 GEN-B2 but i cant play Gi Joe Or Dirt 2, why isnt it working?
Because you need 5.55 to play G.I. Joe and more than likely the same applies to Dirt 2.
wot kind of thing is dat
What he means is that you need firmware version 5.55 in order to play those 2 games. No custom firmware exists yet for version 5.55 though.
I currently have 3.90 M33-3 firmware on mine, can I install this straight on top of the existing firmware?
thanks
will this cfw work on psp phat because i have got 5.00 m33-6
go to mininova or sumotorrent, they have new games patched, dont worry, they work smoothly.
i download genb2 updater, it s a shit, my psp still genb after run it
yer same it is still gen b when i run it
is there an update to the 5.00 m33-6 to play assassins creed bloodlines as of yet