Where do i put my CSO file on my psp?

I have a CSO file that i converted with winRAR.
I have a 3.90 FW, and its a slim
what folder do i put the CSO file in?
plz help thnks

 

You'll have to put the .cso file in the "ms0:\ISO" folder of your PSP
If it's not there, then make it
Also, you must have a custom firmware to play these games
I'm assuming you have an official firmware >_<

 

yeahhh i havnt gotten the chance to downngrade just yet

 

I have a few things to say to this.

First, if you converted* it with WinRAR, you are truly amazing.
*Actually it would be compressed.

Secondly, Just to restate what was all ready said, you need Custom
Firmware.

When you do get Custom Firmware,
Format your Memory Stick, or make a folder called, "ISO" in the root.
((That would be X:ISO))

To downgrade and such use this.
http://forums.afterdawn.com/thread_view.cfm/580254

 

hey

can u help me where to get a firmware and how to use it in my psp ???
and can you help me how to play my sonic rivals 2
help me pls. cause my psp is just new ...