G'day Susan, something you wrote on a post just caught my attention. You mentioned that the picture you had edited looked different on the site to when it was viewed in CS2.
I was grappling with this problem myself recently and I found that is was the colour space setting in Photoshop that was the issue. Pictures on the web are usually sRGB and I had the setting to Adobe RGB in Photoshop which caused a mis-match when putting pics on the web. See this link where I learned about this problem:
sRGB vs. Adobe RGB
Please excuse me if you already know this. It may have nothing to do with your situation as it relates to colour but I thought it might be worth passing on the info anyway.
There is so much to learn about this whole photography/Photoshop business isn't there? I am always learning new things which is half the fun I guess.
Anyhoo, keep taking pics & having fun,
Cheers,
Gerard