Download free maps and mods for C&C Generals: Zero Hour! Command and Conquer: Generals – Zero Hour is the expansion pack for the 2003 real-time strategy video game Command & Conquer: Generals. I downloaded the maps, put the tga and map files in. Can someone direct me on how to 'install' afermarket/custom maps in C&C Generals:ZH. Is a set of six maps for Command & Conquer Generals Zero Hour. Minken's Skirmish Maps is a set of multiplayer.