All known Playstation emulators are available for download at www.emuwiki.com
pcsx2 IS an emulator for playstation 2. no difference x_x
As of April, 2009, no PlayStation 3 emulator has been developed or released.
If it didn't play PlayStation 2 games, it wouldn't be a PlayStation 2 emulator. So obviously the answer is no.
People who are interested in downloading a Playstation emulator can use emulator-zone, which is a popular website for all your playstation download needs. It offers free software downloads as well as demos, and pricing packages.
There is currently no functional PlayStation 3 emulator in existence.
Use an emulator program. You can find one at emulator-zone.com.
The best PS2 emulator in terms of compatibility and relative speed is PCSX2.
PS3 emulators allow you to use your personal computer to play PlayStation games. The main benefit of using an emulator is that you do not need to purchase a PlayStation game console to play PlayStation games.
A PlayStation emulator is a program that allows you to play PlayStation games on another platform, such as your computer or a Dreamcast.
download an emulator
With an emulator for the Playstation games
PCSX2