Out of curiosity, I did a search to see what I could turn up with regard to the 3Deep and True Internet Color software that 3dfx shipped with some (if not all) retail Voodoo5s.  Here are the links I found:

http://www.colorwizzard.com/support/faq.html
http://www.colorwizzard.com/support/faq1.html

Kind of sad.