BACKING UP A UMD IN ISO FORMAT

This tutorial is how to back up your PSP UMD games.

First you will need a PSP with M33 Custom firmware. Don’t have custom firmware? Please read this thread in order to get Custom Firmware -> 2009 Tutorial to Installing Custom Firmware 5.00 M33 on your PSP.

Firstly insert your UMD disk you want to back up to an ISO in your UMD drive of your PSP. Turn on your PSP (if not on) Now hit select or home button to bring up your M33 VSH Menu and select the following:

USB DEVICE: UMD Disc
UMD ISO MODE: Normal




Once you have selected the M33 VSH menu as above, exit the VSH menu. In your PSP Menu - Go to settings USB Mode. Now connect a USB cable to your PSP and connect this to your PC (sorry macs are not supported)

Depending on your PSP it will say “Installing drivers” this is normal under vista. Go your computer and you should now see a Drive logo with the ID of the UMD. In my case for GTA Vice City Stories its ULES-00502. Open this and you will see some thing like ULES-00502.iso. This is your ISO back image of your UMD Disk. Copy this to your computer. I recommend you rename this iso to the games name for easy of use.


You can now make this into a Compressed image file (CSO) or just run that .iso file in your ISO folder of your PSP memory stick to run that game of the memory card. With out UMD lag!!!! Yeah!


Source:
http://pspslimhacks.com/psp-tutorials/how-to-back-up-a-psp-game-to-iso-format/