Once you've burned your CD for playing in "normal" CD players, you can't just "cut & paste" the files back into your computer to play... What I'd do (unless you're using most of that 40gig harddrive) is get a program to convert your services from the CD into MP3 format... then you can save the .mp3 file on your computer.. windows should be able to play it... if not, go to http://www.winamp.com
to download a free mp3 player with all kinds of cool add-ons
If you need a program to create the .mp3 files try http://www.ashampoo.com
(Audiocenter v1.50) seems pretty handy for what you seem to be interested in doing..
If youre simply trying to play the CD in your laptop & windows media player is having a coniption... Winamp is a good alternative!
Hope this helps you