Thank you Jace-BeOS. After trying everything that I could for two days, I came to the conclusion that even though the task seems relatively easy, the feature that I am looking at is not possible.

My car stereo only plays MP3 and regular CDA files. CDA is good and the tracks play continuously gapless, but each CD can only be 80 minutes. So compacting several CD's into one would not work. For a while I thought that Foobar has trick to fit more than 80 minutes on a CD, but I was wrong.

On the other hand, MP3 is good in the sense that I can fit many albums on a single CD, but it is horrible for gapless music such as live music. As the song goes from one track to the next, the player has to read the new file, and it looses the flow.

I am just amazed that with the technology that we have, this simple task cannot be done. Oh well! Finally, I have decided to do what you suggested, and rather than burn CD's, to put all the files on my iphone and go in that direction. Of course, I have not tried this yet, but from what I read on the web, itunes should produce gapless music. So, hope fully this will work. I would like to thank all of your for all your help and suggestions. I guess I will close this thread.

Your best solution is to get a portable mp3 player, one that will support rockbox (http://www.rockbox.org). Rockbox can produce true gapless output, unless the mp3's themselves have additional silence at the beginnings or ends.
Then plug that into the auxillary in of your car stereo - or buy another streeo head unit that has aux in.
I have an iaudio i5 which gives me 30GB of space, has the best sound quality on the market (for portable - and disregarding newer models by the same company) - supports rockbox and I can play back flac, mp3, whatever.