Encounter an error while trying to play game on rpcs3.

I don't have a ps3, if I had ps3 then why should I use rpcs3? Now please tell me method in which game's iso is used. Because I tried this method but this name folders were not in the game iso.
So please give me any other method. And thanks for your help.

To make developing games, debugging and modding them easier. RPCS3 is not developed for enabling piracy, but rather preservation of the games. Please also keep in mind that we don't tolerate piracy, and piracy may result in permanent suspension.

I didn't bought any pirated game, I got it from my friend, who has an original ps3.

And for the fact then why rpcs3 was created, to play Tetris like games or games which people really want to play like God Of War 3, The Last Of Us, Uncharted 3 etc.

Even when pcsx2's earlier versions were there, one was able to play games like God Of War 1-2 etc. Now with latest versions, one can play games even with more flexibility and features like save state etc.