Hacking Problems with Super Dangan Ronpa 2 iso

[BaraNoTenshi]

Hi guys, I'm havin' troubles with this iso. The bgm won't play. Voices and sfx works just fine.

Psp model is 2000. It's updated to the 5.50 prome-4.

I'm trying to find out if the problem is the iso or if it's just the mod that it's old and needs to be upgraded.
What do you think?

 

[Rydian]

Is it actually an ISO or is it .CSO?
What sort of memory stick?

 

[BaraNoTenshi]

ok, googling a little more I found out that on the 6.60 PRO C works fine, but I don't know how to change from 5.50 prome-4 to the 6.60 PRO. I'm searching in the stickies, but I can't find it OTL

 

[BaraNoTenshi]

Is it actually an ISO or is it .CSO?
What sort of memory stick?

the memory stick is a micro sd with an adaptor, and the rom is .iso

 

[Rydian]

Prome is one if the 5.x ones, so the first section of the sticky shows you how to wipe so you can update.

Adapters are known to cause issues.

 

[BaraNoTenshi]

actually googling a little more I found how to change it all the way to OFW 6.60! from here I can follow the sticky! thank you very much ^^