I did step through all that at installation time. The only things I left it associated with were real RealMedia files. (Oh, and I think I took one of the video formats back from Windows Media Player because I like Real's interface better.)
I am positive there was nothing in there about playing audio CD's, and that if there had been I would have left it associated with WinAmp.
All this, of course, being entirely beside the stupidity/evilness of having install-time-only options for something this basic. As well as taking it back from what I specifically changed it to.