|Virtual memory is another term for paging file. Windows should be ok managing it, but if you want to manage it manually, this is what I have gathered over some time: Up to 1Gig or so RAM, use 1 1/2 times up to 2 times your RAM in Mb (1000Mb = 1Gb), and 2Gb RAM or more, use the same as your RAM. |
As far as your upgrade, you did not give much in the way of details, but I suspect that you could not achieve what you are looking for with any reasonable upgrade (P4 2.6G). I would recommend keeping your current system as clean as you can and look into eventually replace with something built, or on sale. Don't be afraid of Windows 7 home edition, look for dual core pentium or core2 with a separate video card (depending on your uses).
You have to be a little bit crazy to keep you from going insane.
If all else fails, read instructions.