Sorry, I overlooked the thread title. Does Nero Wave Editor have dithering? Couldn't find it. I'd get Audacity for dithering (I think shaped dithering is preferred) and I'd get CD-Wave to split your show into individual tracks. It would be a good idea to archive a FLAC copy of the show at 24/44.1 as well. Both of these programs are used all the time by tapers and traders.

CDWave (free)
http://www.milosoftware.com/cdwave/download.html

Audacity (free)
http://audacity.sourceforge.net/

If you don't like Audacity you could use Soundforge (you can find it for as low as about $50) or something similar for dithering. Wavelab with Apogee UV22HR is the best for dithering.