Seriously, play the rom. There's no difference between the PSX version and the rom version. Except for the two FMVs that you can download from the internet. The loading times are incredibly annoying, and it's always nice to have the ability to save whenever you want. Buy a joystick too, then you won't have to use the keyboard. I'm currently playing the Swedish version.

"Skit, da måste jag döda er alla!!"