Hey cardoso!,
If you've used TMPEG before, you're almost done!.
Just load your DV file with TMPEG, as you've done before, and then load the KVCD template.
I must remind you that your DV camera's frame rate is probably 29.97Fps, and you won't get as much compression as if it was 23.976Fps.
Still, you should be able to fit around 90 minutes in a 80 minute CD-R with exceptional quality.
Remember to change the frame rate in the template from 23.976 to 29.97 before encoding. You must also de-interlace your source. I don't have a DV camera, but I assume the output is 29.97 interlaced video.
You can de-interlace your video, also with TMPEG.
Here's a link for you to start!:
http://www.inmatrix.com/articles/videocapture.shtml
kwag