My question is how to play games in psp without cracking?

I have an without cracking psp.....My question was how to play .iso or .cso games in psp.....most of them and answer r there like only(create a ISO folder and insert the .ISO or .CSO games on it) then unplug the psp from computer and play the games in games folder on psp......i done all these procedure but when i see my psp showing(no games are there)to play....so plz help someone to play the game or to crack the psp