using Nero 7, I checked the "don't add space between tracks" option. Also, I recorded 24-bit, but I'm saving out of CDwav as 16-bit because I was having trouble with flac properly encoding the 24bit file. I'm burning from the .wav's though so I can leave flac out of the troubleshooting process for now. Any help is appreciated.
after you track out a 24 bit file in CD Wave, when you go to save, you need to check the box that says "Save in alternate 24-bit format"
once you do that, FLAC should have no problem encoding the tracked 24 bit files.
also, CD Wave is a great program for tracking, but probably not the best for converting 24 bit down to 16 bit. you'd probably be better off doing the conversion in a different program. do a search, as there are many options for that.
but, even so, you only need to do the actual tracking once. open up the original 24 bit wave in CD Wave, set the track markers, save the files, and then save the CUE sheet.
then open up the original file in a different program and convert to 16 bit. then open up the new 16 bit file, load the CUE sheet, and all your track markers will pop in at exactly the same place. then just save the 16 bit files and you're all set.