I would suggest asking this in an Armada forum as they can explain it much better than I. Basically, put the .sod file in the 'sod' directory of Armada. Put the textures (.tga) in the 'Textures\RGB' folder, and put the .odf file in the 'addon' directory. After that, I can't remember which files you have to edit and how, but you've got the files in the right place for Armada 1 (Armada 2 is a little different).