This mod from ReaperPL re-textures all of the Marines in-game.
Reaper's Marine Corp
This "mod" adds new textures for all of the Marines from Doom 3. Textures are in the to formats: .dds and .tga. Just look at the screens.
Include Faiakes hand mod.
Instalation: Unpack the folder. Open pack002 (Doom3\base\pak002). Copy the texture from the folder, and replace the older.