Things You'll Need
Instructions
Insert the UMD disc from which you wish to extract an ISO into your PSP system.
Power on the PSP, then select "Settings" from the media crossbar. From the "Settings" menu, select "USB Mode" and press "X." This will allow your computer to connect to your PSP system as though it were a removable storage device.
Connect your PSP to your computer using a USB cable.
Press "Select" on the PSP to bring up the recovery menu. From this menu, highlight "USB Drive" and press "Right" on the directional pad to change the setting to "UMD Disc." Press "Start" to save your changes.
Open the start menu on your computer, then select "Computer." You will find your PSP under the "Removable Storage Devices" heading. Double-click on the PSP to display a directory containing the ISO image file from your inserted UMD disc. Drag-and-drop the ISO onto your local hard drive to save a copy of it. To load the ISO image from Devhook, simply drag-and-drop the ISO into the "ISO" directory on your PSP memory card. You will be able to load any ISOs moved this way by selecting "Games" from the Media Crossbar.