Equinox:  An arctic environment with wide open spaces and mid sized mountains.  
A great map for both Free-For-All and Team games that also supports bots.  
Team drop zones are spaced as follows; Team 1< 2k >Team 2, Team 2 < 1k > Team 3, Team 1 < 1.5k > Team 4.  
Equinox supports Attrition, Destruction, King of the Hill, Steal the Beacon and Capture the Flag for up to 4 teams.

Unzip all the files and place them in your "mechwarrior4/resources/missions" folder

Thanks and have fun!

PAINGOD