Hello I have been hunting for the answers to my questions for 2 hours and I cant get to them on this forum. I am sure its there and I'm probably too thick to figure it out. So heres the scenario. Just got a PSP 1.5 modded to 3.40 oe-a. Got a 4 gig memory stick as well. Now trying to run ISOs that I downloaded. I cant seem to figure out where to put them on the memory stick. I read that I am supposed to make a folder called ISO and then dump the iso file there. Well, I did just that but when I try to go to the saved data in the memory stick from the PSP menu it says "no games found" Now, i kinda figured out that I need a demo UMD or game disk of some sort to make the ISOs play. I just purchased one from ebay, its on its way. But in any case, the game should show up in the menu shouldnt it? Furthermore, when I try to format the card with the PSP it comes with an error 80016b somthing but I try to do it with Windows and it formats it without an issue on FAT. Is the memory card bad? And also, any ISO file will work right? PAL, US, JAP version? So my questions are. 1. Why doesnt the game appear in the menu when its saved in the ISO folder? 2. Will any ISO work? Why is CSO better? 3. Where do I need to save these isos? If someone can help me out or point me in the right direction, I would be much obliged.