So, I used guide on ps3news to convert PS2 iso and install it as pkg.
I tested on one game with small size - it worked perfectly well.
Then, I decided to try Mafia game, one of my fav though: it launches well, then intro movie and freeze.
Also I tried to run it through PS2 Classics Placeholder but result is the same.
What the problem might be?
I downloaded iso file from pirate bay, if you want to try yourself.