I found the problem..
In the past, I just launched SmartStart, and sekected Burn a Data CD/DVD. For some reason, it brought up the right program to do the job. Now it doesn't.
If I launch Nero Express, I can burn with long filenames, set options, etc.
and yes, to answer your question, I do need longer than 64 characters. I am archiving music from my HD to DVD, and with names like:
A Doo-Wop Treasure Chest Vol 5 - 04 - Herman Griffin & The Mello-Dees - Hurry Up And Marry Me.mp3
that are longer than 64, I do need the ability to write long file names.