I would like to increase the speed of my PhotoShop CS3 actions. Currently the PS program is on it's own hard drive. I have a Dell XPS a few years old with these specs, Windows XP Media Center Edition, 2.80 gigahertz Intel Pentium D, 3584 Megabytes Installed Memory. Could someone tell me what (if any) upgrade(s) would make a real world difference? And if someone could suggest which upgrade part to get. Thanks.