My 2GB came today from newegg.com. I installed it (which brings me to 4GB RAM), added the 3GB switch to WinXP Pro Boot.ini (Like VISTA, XP only sees 3GB of the 4GB). Adding the 3GB switch allows Photoshop, etc to use the full 3GB for virtual memory instead of just the standard 2GB. I haven't tested Photoshop CS3 yet, but I noticed Lightroom is much smoother when I was jumping around folders and moving large batches of images.