Hopefully someone will be able to help.
I've bought a Pandora Battery and I bought the 1GB MMS stick with v 4.01 m33 on it. Installed that and then downloaded a couple of .COS games. Put them into the ISO folder and bingo...they worked fine.
I then decided I wanted to use a 4GB card for more space, so after discovering I couldn't just copy files from one card to other to make it an MMS, I downloaded PSP Grader which converted my stick to an MMS with 5.00 m33.
Plugged that into the PSP, games are there, everything fine.
Then I took the pandora battery out and put normal battery in, games aren't there. Assuming that you can't play the copied games without pandora battery I placed that back in. The games can't be found on the menu system. I put the original 1GB MMS back in and still there's no sign of them, yet they're still in the same ISO folder.
Anyone have any ideas how I proceed from here?