In the game directory Rename the file "windows.fit" to
buymechcommander.2 then during game play type
lorrie This restores ammo and armour.
osmiu This puts you in god mode

Change your mechcommander folder name to buymechcommander2
When playing game hold shift and type these cheats:
GOLDMECH=money
ULTRACOMMANDERFORGEINHEAT=unlimited dropweight
ATLASAWESOMETACTICAL=get all robots