by cda i assume you mean CD Audio? do you want to do this by burning a cd, or do u want the cda files on your hard disk? If you just want to burn a cd, get yourself a copy of nero....its dead easy to use. If thats not what you meant, ignore me
you can get it from www.download.com, or just get it off kazaa, Nero 6 is the latest, and its very easy to use! If you have any bother just shout