How to replace models of certain parts in a mod?

[LandZZZ]

I want to replace certain parts from USI-LS mod with my own models I designed. How should i do it?

[wasml]

I would use a MM script to change the model used in the USI-LS cfg file to point to your own model. You could directly edit the USI-LS cfg file but then any USI-LS updates would wipe out your change and require re-implementing the change. If you use an MM script and keep it in a separate folder (GameData\MyMods\MM_patches for example) you can avoid this.