I stumbled across an old zip disk of mine that has the original source files for the Sherman Project dating back to 1999. For those of you that don't remember, this was a mod in development on the Half-Life engine that was trying to recreate the Rainbow Six environment. I had fun back then but it never saw the light of day :( Here are some of the memories....
http://www.3dretreat.com/sherman/sherman_tripletap.zip Triple Tap - 788k video
http://www.3dretreat.com/sherman/sherman_flyby.zip Training Grounds Flyby - 4mb video