Configuration File
This is about where you find your client configuration file.
Its different from system to system (even between windows version it differs).
Windows XP:
C:\Documents and Settings\%USER%\Local Settings\Aplication Data\BZFlag\2.4\
Windows 7/Vista:
C:\Users\%USER%\AppData\Local\bzflag\2.4\
Most Linux Systems:
/home/$user/.bzf/2.4/
Mac OS X: (thanks to Guest)
/Users/yourusername/Library/Application Support/BZFlag/2.4/config.cfg
The 2.4 directory can be called 2.0, 2.1 or 3.0, too. It depends on the client version you are using. Thats why it's possible that you can have 2.0 and 2.4.
Missing: Solaris, Irix



Mac OS X
/Users/yourusername/Library/Application Support/BZFlag/2.0/config.cfg