Can't play CSO games?

Question

I got my psp, a 4gb memory stick, a ISO folder, a USB cable, internet , and maybe other things how come i don't get to play my games even i downloaded from this site http://ssubzzero.multiply.com/journal/item/205 and when i downloaded i get the game and put it in the ISO folder whats wrong?

Answer 1

didnt you read that thing?it says you ned custom firmware wich you need to download and install in your psp or else it wont work.the firmware migh mess up your  psp and it will get bricked.(not turn on)so be carefull doing that

Answer 2

you missed to state the most obvious thing needed to play isos/csos. CUSTOM FIRMWARE. you did all the right things if you had custom firmware. what firmware are you running? if you have custom firmware, it should show up in the games>memory stick section in the psp menu.