The term "MP3" has become a somewhat generic term for compressed music
files. Players that play WMA files, AAC files (iPod), ATRAC (Sony) are all
called "MP3 players". There is, of course, an actual MP3 format. You can
burn a "data CD" using Windows Media Player. You have to choose the option
"data CD". This copies your compressed files (WMA or MP3) onto the CD-R.
Just copying files to a CD-R using windows explorer DOES NOT WORK (OK, in
95% of cases it does not). Drag and drop to a CD-RW is called various things
(my H-P drive calls it "Drive Access"). This is actually a special "packet
writing" feature, available on CD-R or usually an RW. This will almost NEVER
play on a DVD player, MP3 CD player, etc.. In fact, it typically only plays
on the PC where you recorded it. You can easily use EZ CD Creator or some
other software that proably came with your computer or CD burner (HP is
called "Record Now") . Windows Media Player has a built-in burner that can
do this, too. Honestly, I have had better luck and faster burns using either
EZ CD Creator or Record Now (different PCs). Just pick the "data CD" option,
or you will get an "audio CD", which is the same format as a CD you buy at
the store (.cda or uncompressed PCM audio). If you burn an "audio CD" you
get max 80 minutes of music, but it will play on anything (car, DVD,
portable, boombox, etc.). If you burn a "data CD" you will have to have some
kind of player that can play the files. MP3 is the most widely used format
and the most universally supported (many new cars come with an MP3/CD
player). Not so many cars, etc. play a WMA file, so you if you want a data
CD that plays on the most players, rip your records into MP3 (Windows Media
Player 10 has this option built in for free). There are also a boatload of
other free MP3 rippers availble (CDex, etc.). If you have Windows XP, get
Windows Media Player 10 (free). There is no "add-on" for MP3--it comes with
it.