Starsiege: Tribes -- Football Mod 1.2 client side soundpack and model pack, updated 30 May 2002
Special version for GSL : http://thegsl.com
Downloadable from the Tribes Football files archive: http://amishrabbit.com/tribes/football

Sounds from Football Pro '98 (Sierra Sports), NFL 2K1 (Sega), NBA 2K1 (Sega) and other Internet sources 

Flag skin - Angel Kill
Football skin & model - Angel Kill

Instructions for use:

Unzip the \Football folder into your \Dynamix\Tribes folder

The Zip should create a folder called Football containing WAVs and model files.

When you next restart Tribes, the clientside files should be available to you.

The client pack will not interfere with or affect client behavior on non-Football servers.