You can play ISOs and CSOs by putting them in your ISO folder in the root of your memory stick. You can find the games on google. You don't need any programs. The only things you need are a USB cable and a computer. You can also further customize what your PSP can do by going into the Recovery Menu which is done by fully turning your PSP off and back on while holding the R button. Also, by pressing select you can adjust things such as what the cpu clocks out at for the XMB or your game. There are tons of different things you can do depending on whether you have a fat psp or a slim one. But just so you know, with a 2GB memory stick, you're still going to be carrying around those UMD's. For people like you and me who don't like carrying stuff around, 8GB is the only way to go. And that's only because the 16GB still cost a ton and the 32GB isn't out yet.