PSP 5.05 Firmware out!

This is one of the follow-up of Sony's UMD only firmware update(similar to Hot Shot Golf 2s included 3.96 update). 5.05 comes with the new IDOLMASTER game released in Japan just recently, and Gundam Senjou No Kizuna. Playing these two games on custom firmware 5.00 M33-6 proves to be unsuccessful, so theres new compatibility additions in the 5.05 firmware that is needed for the game to run properly. I packed the umd type of a PSP firmware update into a PBP EBOOT.PBP format. Feel free to look at it. I attempted to decrypt it with psar dumper w/ 5.00 decryption by Dark_Alex, but it errored after a few decrypted modules. It works at extracting every module w/o decrypting it though.

I tried using version.txt to play the games mentioned above, but it seems to be of no avail(chance of success is 0.01% afterall).

PSP Official Firmware 5.05:
http://rapidshare.com/files/213624667/505.PBP

This is VERY old. It has been almost over a month since that firmware is released (it was created in opening JAN). And there is a way to play idolmaster on 5.00 M33-6, however u wont be able to access online support (PSN) in that.

http://www.dark-alex.org/forum/viewtopic.php?f=83&t=9796

Read the whole thread and i think theres a solution to the problem near the end. (You just have to do a bit of hex editing to the ISO dump)