link to mod: Moddb.com
Variation mod is not required for this, but many less models will be used. And don't worry, as long as "prefetch_single.ltx" in "gamedata/configs/prefetch" does not have the models that are not used in vanilla included, the models that are not available in vanilla CoP should not take any additional RAM / VRAM.
Just copy the models & textures folder and paste it inside the gamedata folder. Also, to use the outfit_novice config, you'll need to merge it with the one from CoP. The fastest way to see if it works, is to go to the Merc base and give 'em hell.
2 screenshots with HD models and my enhanced M.S.O. 1.01 for testing purposes:
