For the *nix inclined.
robiwan@synapse:~/Desktop$ file cfg.1.9s.us.rar
cfg.1.9s.us.rar: RAR archive data, v1d, os: Win32
robiwan@synapse:~/Desktop$ unrar x cfg.1.9s.us.rar
UNRAR 3.71 beta 1 freeware Copyright © 1993-2007 Alexander Roshal
Extracting from cfg.1.9s.us.rar
Extracting...