Outdated version, including Creaturepedia made by ThGryphn. Install the mod on top of Tribes of the East + Patch 3.1 (sometimes called 3.01). Always uninstall an older version of the mod before installing a new version.
Hotseat & LAN require script activation!
MMH55 is a script extension and H5 does not have scripts activated in multiplayer modes (Hotseat & LAN) by default. Therefore it is required to activate scripts on newly generated RMG maps and also on multiplayer maps downloaded from the internet (which don't have any scripted content) if you want to play those in Hotseat/LAN. You don't need to do this for playing in single player. All H5.5 default maps and included maps have scripts already activated.
MMH5.5 has higher system requirements ,you can pretty much consider the H6 requirements as applicable. Otherwise you may suffer from adventure map lag. MMH5.5 uses more detailed landscape textures. Next-gen core-ix processors with high clockspeed on single core really make the AI 'fly' and are highly recommended.