SourceYou will know his name from his previous releases. pr0p0sitionJOE has released a fix for Hatsune Miku Project Diva: Dreamy Theater 2nd for custom firmware users. So for those of you who enjoy Japanese titles can grab the fix below. Also note that a one time use of the PSP launcher is required.
Download: NPJB00134 CFW 3.41 & 3.55 Fix
Download: PSP File Launcher (Use only once)
PS. I activated my PS3 version of the game with the PSP and have been playing in it. I copied my save data from the PS3. Anybody can check with them working without PSP or not? (Most probably you need to use firmware Rebug to use my save data).
Download: save data