I played Quake3 about 18 months ago, for about 30 minutes; Uninstalled it, and gave it back to my friend. Even though it was an original disk, I was ashamed to have it on my computer. 'Wouldn't touch it with a ten foot pole' is pretty much the review I gave it.
Anyway, Quake3 probably saves the scores in a single file somewhere. Check google and see if you can find one of the clan geek sites that will tell you how to save your state.