Scott has never recorded any vocals for Nothing.
This was posted by Michael on 12-17-03 on this BB:
Nothing was actually a song recorded for Weathered that was never finished. It was recorded musically but Stapp never recorded the vocals. It is a long, very moody, dark song kind of similar to Who's Got My Back. It also has a long solo that Mark has always said was one of his best.
Michael
Here is the link for that thread
Nothing