A guide for iTunes users who want to learn how to burn audio CDs. Gives instructions on how to create MP3 files from audio CDs or download them from the Web, then moves on to searching and browsing through new music collections, creating custom play lists, and burning CDs. Advanced material covers using iTunes with a portable MP3 player and exchanging MP3 files with other people. Assumes familiarity with basics of using a Mac. LeVitus is a Macintosh columnist and speaker. Annotation c. Book News, Inc., Portland, OR (booknews.com)