Codex cadian officers give you a new model you can use for imp as a new commissar type of leader. Just look at the pic.
by C2C team (kjon)
Make sure you include the C2C team in your mod credits
1] Put the art file in 'dawnofwar\your_mod\data'
2] Put the attrib file in your mods generic file
3] Use the attrib editor to link and customize them to your liking