i have fat psp with cfw 4.01 m33...
i got a new slim psp 3.95, so i converted my fat battery into pandora nd the memory stick into magic stick to upgrade the slim to 4.02 m33v2 so it can paly downloaded games...
then i reconverted the battery and memory back to normal...
the problem is ...
i have 2 megaman iso, cso gmaes and none of them seems to work on either psps..
all I got is black screen...
I don't think they are bad isos,csos...
so i guess the problem has something to do with the custom firmware but i'm not pretty sure...
1. Turn off your PSP fully (by holding the power button)
2. Turn it on again while holding the R button
3. This should bring you to the Recovery Mode
4. Go to Config
5. Clcik the UMD mode until you reach to NP9660
6. Exit the Recovery Mode
Do not mess with the Recovery mode unless you know what you are doing.
@Touge_ko , it just makes a virtual UMD inside the PSP. So it makes the PSP thinks that the ISO you are playing is a UMD. There are different types of modes, but using np9660 (Sony made it) is the best.
I had problems with 4.01 m33 and so i downgraded to 3.80 m33-4 and run that MP9660 and i have Megaman iso and it runs fine, but what you could do if you haven't already is make it an ISO not a CSO
