problem regerding .cso file?

Question

recently i downloaded one game after extracting it is showing the file cannot open , i have no idea about .cso file .anyone plz give me information about this type of file and how to open the file and play the game . If any software is required to open the file plz say where i can download the software

Answer 1

A .cso file is a compressed .iso image of a game for the PSP. I've never used one, so you might want to read this:

http://www.mobilecastle.biz/mobiles/psp-software/15122-tutorial-how-install-devhook-psp-play-games.html