I am very new to PSP and have just purchased a 1.5 with 3.02 OE-A Firmware installed. A week ago i had a few CSO games installed on the memory stick and they worked fine - i also Formatted the stick to replace them with other ISO games. Today i wanted to change the ISO games on the memory stick - i plugged the usb cable in as normal and formatted the memory stick so it was empty. When i moved the CSO files into the folder on the stick, PSP/GAME they loaded onto the stick via the usb cable and appeared in the folder. The memory stick on my PSP also showed a deduction of memory for the correct amount of the ISO files. However when i go into GAME then MEMORY STICK on the PSP to view the games it says "there are no games" i have tried it over and over again and have no idea why the ISO games are not available anymore. Please can somebody help.