Unknown Song #45, best known for its use on the second post-9/11 highlight, has been identified as "Survivors." Survivors is contained on the Koka Media album called Double Drama, Volume 1 and was written by Daniel Darras & Christian Leroux. I couldn't find much of anything on Darras beyond his presence on Koka albums, but Christian Leroux—also known as Basile Leroux—is apparently a well regarded French studio guitarist. Special thanks to Craig-UK for finding this track.
A couple more non-highlight songs have also been identified recently, so look for my posts about those in the near future.