No software download can add PS2 or PS1 backward compatibility to a PlayStation 3. It's entirely determined by your console's model and hardware revision.
| Model | PS2 Playback | PS1 Playback |
|---|---|---|
| Launch 20/60 GB (CECHA/B/C/E) | Hardware (EE+GS chips) – Full | Hardware – Full |
| 80 GB (CECHE/K) / MGS4 Bundle | Software emulation (partial list) | POPS emulator – Full |
| All later models (40, 80 new, 160, 250, 320, Slim, Super Slim) | None | POPS emulator – Full |
Check the model number on the back sticker (e.g., CECH-2001A). That tells you exactly what's possible—no guesswork needed.