All PS3 models play PlayStation 1 Games and do so through software emulation.
It's a PS3 console and if it works then yes
Yes the Playstation games will play on all PS3 models
Yes all PS3 can play any PS3 games if the have current updates which includes the latest 3D games
Yes all PS3 consoles play PS1 games and do so through software emulation
The 40 GB model does not play PS2 games. Sony says that there in no method that will allow you to be able to. No hardware, upgrades, cheats, software, or anything else that will allow you to change that. Good thing the PS3 has so many great games it is not even a big deal
The 40 GB model does not play any PS2 games
You don't. The 40 GB PS3 is not one of the PS3 models with Backward Compatibility. Sony claims that there is not anything you can do to allow it to play PS2 games. see related link
Unfortunately, Sony has not added that to the PS3 Slim. If you want to play PS2 games on a PS3 you might want to try a PS3 40 or 60 GB system.
Yes (both PS1 and PS2) if you have the 60gb version. The 40 wont. Please note you can play PS1 games through your PS3, on your PSP (remote play) but not yet PS2 games.
No most do not play any PS2 games and only a few old 4 USB port PS3s play any. All PS3s with 2 USB ports do not play PS2 games. Every PS3 produced after August 2008 does not play PS2 games and neither did the 40 GB models produced before then
No it does not Play PS2 game see related link
I believe all PlayStation 3's are Region free, but maybe not