I have an older Dell Laptop that came with Windows 2000, 800 mhz, 256 meg Ram, 40 gig HD. I installed Windows XP and had it upgraded to 512 meg Ram, and I set the Virtual Memory to 1024 meg min. and max. (from a How To Article). Are these settings OK or should I reset them, or scratch the Idea altogether, and leave it at the 512 meg only? For best performance?