The mechmad.zip file you have requested: Modifications / Single Player / Mech Mad (1.0) - 23.5mb is not available. Perhaps try browsing all files for the game Battlefield 2142 and upload any files you want to share or are missing. This is the only information we could locate:
Here are premodded Suez Canal Levels that will change the amount of "Mechs" you can see in at one time. Each Different folder contains only the server.zip file. So to install just copy it to the Suez Canal folder. Please make a backup of the orig Have as many as 20 Mechs in Suez_canal at one time.. or if you prefer, have 4.. its up to you. Premodded zip archives that will allow you to use between 4 mechs and 20 mechs in the game.