Its possible. Let me explain, you see ex. Brit_kgl_uniform.2 etc.
Well it will take time. You can copy the pants and paste them on every uniform that needs it. You can add it like for ex. Brits_kgl_uniform.5 with its lod's . (I use .5 cause i know then that no unit has .5 and that its a pants file) so you do that for ranker, or officer etc