I just acquired one of the Idolmaster SP ISOs and I can't get it to run on my PSP. I can run other csos and isos and I have been for a while, but this one isn't working. If I load it up the screen goes black and hangs there. I have manually turn the PSP off. I've played around in the M33 Recovery Menu and tried almost every combo of UMD Mode, Kernel etc. If I go to Recovery>advanced>advanced> and turn the execute BOOT.BIN thing on, I will get the 80020148 error when I try and start the game. I've looked online and tried all the fixes for that and nothing seems to work. Could it just be something with this game? It's newly released and not really popular outside of Japan so I'm having a hard time finding any information on it.
From what I have read there is something a bit odd, the date of 5.05 is earlier than 5.03. I guess you will have to wait for the official 5.05 (or l8r) to be released then wait for a DA update.
Dave
PSP, all the way from 1.00 to 5.50 GEN D2 - DS Lite w/ M3DS Real (M3 Sakura v1.34)
PS3 3.01 - iPod Touch 2G 16GB Jailbroken - Xbox 360 60GB - PC, Q6600, 3GB DDR2, GTX260 (216) 896MB
