Murray: THANK YOU! That must have been what happened, because everything seems to be working perfectly now!
Skydog: Cleanup worked wonders. I was shocked to see I had over 5 Gigs of useless info just taking up space. It's amazing how quickly those temp files collect.
Swampy: Sorry, I didn't mean to ignore you in my last post; I didn't see your reply before I posted.
I know 512 is nothing much for CS2, but I'm not really doing anything too serious. I'm primarily doing minor edits on pics that are 4" x 6" or smaller and they're not more than 300 dpi. That said, I still find myself waiting (sometimes for quite a while) for the program to process some tasks, and I am planning on upgrading as soon as I can afford it.
I really don't mind the wait, as long as it works in the end... and now I can go back to happily making circles.
Thank you all again for your help.
- James