OR.......... you can just download a demo of nero5 and that will take your mp3 files and convert them to wv files and burn them to cd all in on easy step!
There is a freeware pgm that is very fast and easy to use called MPEG Suite you can find it by going to ec2000.xperiment.net its a fast pgm and easy to set up and has both an encoder and decoder from mp3 to wav or wav to mp3