Giants Map Manager - Beta version page

What does Giants Map Manager (GMM) do ?

GMM is a utility to play multiplayer games of Giants:Citizen Kabuto (GCK) on customized maps. GMM integrates directly with Gamespy Arcade and GCK, no cumbersome manual copying of files.

GMM also can share GCK map modifications. So if you don't have the new modification that the host has, it will automatically download the necessary file before you join.