I don't like italians because everytime they win a football match against germany ;-)
But I really like their cars (Ferrari, Lamborghini, Pagani, Fioravanti etc.)
Hehe, but now back to topic.
I think you need a new computer. Amnesia isn't compatible with that slow hardware and when it would be possible to start the game, it wouldn't be a good experience at all. But I'm sure the Penumbra Collection should be able to run. Do you already know that games? Penumbra is at least so good as Amnesia, it's also made by Frictional Games.
But for Amnesia, I recommend to buy a new computer. It's absolutely worth it.
The game is amazing and there are even some other good games you would be able to play when have a new computer. Costs only 500 Euros, that's enough.
I think there is no way to get Amnesia working on your hardware.
I found a good computer for you, it's from a german shop, but really good power for little money.
http://www.one.de/shop/product_info.php?...ts_id=6169