I think you might have better luck in the computer help forum.

Here is a link that might be useful: Click here

I use CD-R. I find that the other format - CD-RW - doesn't work everywhere I need.

You should use CD-R CD's, since they are cheaper. Just let the iTunes application burn the CD for you. Does your eMac have a CD burner?

If it does, first create a "Playlist" in iTunes, and name the Playlist as you wish. Drag the songs that you want, into the new Playlist folder. The songs will be either in the "Music" folder in iTunes, or in the "Purchased Music" folder in iTunes. You may want to drag the songs from the Music folder and leave the Purchased Music folder alone.

Once you have dragged about 18 songs to the new Playlist, make sure each one has a check-mark on the box next to each song. To check-mark all the songs in the Playlist at once, press and hold the "Apple" key, and with the mouse pointer "click" on the first box. Now all the songs should be selected.

The next step is to click on the iTunes "Burn CD" box (just follow the dialog after you have clicked in the Burn CD option). This CD should play on most CD players.

I suggest you try M4V Converter Plus, it can solve your problem easily.