Thought it was dual core! ;-) Just goes to show...........!
Will the extra RAM make a difference when I'm running only 32 bit Windows?
Probably should make more space available to CS3 in scratch disk space too?
Change OS to Win XP, add 2 GB RAM and then Google "3GB switch" to learn how to get WinXP to let applications use 3 GB instead of only 2 GB. The extra memory will then be recognized by Photoshop and will show up in Preferences---->Performance----->Memory Usage.
I meant "Upgrade to Win XP Pro."