Chris, right now I am away from my own computer (and CS3)- I will look around for that location Sun night or Mon morning when I get back.
What Windows are you using? (This will make a difference, probably, as to where things are located). I am on a Vista PC- with Vista, a lot of stuff lands in the AppData>Roaming folder. If you want to look there, you must make hidden folders 'visible'- AppData is normally an invisible folder. I always leave mine visible, and in my nightly GenieBackup save, I save the contents of AppData along with everything else.
In the meantime, you might want to post on the Layers forum (under the Photoshop section)- lots of Ps savvy folks there:http://www.layersmagazine.com/forum/index.php