Downloading and playing PS2 games on a PS3 via PKG files is a popular method for users with modified consoles (CFW or HEN) who want games to appear directly on their XMB (home screen)
The most straightforward and legal way to play PS2 games on your PS3 is by purchasing physical PS2 game discs. The PS3 can read and play most PS2 game discs. download ps2 pkg games for ps3 free