A lot of people have been asking the same question on other peoples videos so I thought I'd make this to try and help explain. WHAT IS AN ISO?! An .iso is a disc image file. It stores all the information from a disc and can be used to run a virtual drive, allowing people to run CD's from your hard disks without actually having the CD in. It's the same principal for PSP iso emulation. You'll need a custom firmware installed for this to work. I recommend at least 3.71 m33 and above, mine is …