Hi Frank.
Upgrade to Windows 7 like your life depended on it. You will notice a vast improvement. One of the easiest upgrades to ever grace the face of a computer screen and by far the best operating system Windows has been able to put out for consumers. (not including Windows 2008).
Speed is the single biggest improvement.
Just do it...
cheers
Rod
ps I'm leaving for an undisclosed overseas destination now, so I'd be happy to hear how the upgrade went on my return... one day.. honest...