I run Photoshop CS3 on a laptop XP pro 32 bit  not that high a spec with 2meg of Ram and CS4 on an Intel i7 940  Machine with oodles of triple Ram The software is Ram intensive in both CPU and graphic card needs and works superb in 64 bit But most half decent machines should be fine as long as there is enough ram..   The new healing tool blows me away!

Yeah the first link the guys voice is very annoying!

Danny O'Byrne  http://www.digitalartzone.co.uk/

"All the technique in the world doesn't compensate for the inability to notice" Eliott Erwitt