Did you have any luck with this? I'm trying exactly the same and naively thought I'd just be able to swap my slim's 160GB hdd with my fat's 320GB but it tells me I've got a problem with the system software.
Any help would be appreciated.
i have a ps3 fat that has the YLOD and am getting a slim ps3. how can i get my data from the fat hard drive to use on a slim? just want to get my saved data to work on the slim.