MegaGlests' game mods menu let's you install many new mods. Even more are available on the MegaGlest Wiki and the Mods forum.
Well, that will be hard for you....move to glest-game/techs/magictech/and then youh had to edit EACH xml file that you found in this directories (i think something like 50) And of course you had to change the name of the unit-folders.