[GIMS V] How to create LOD for Models?

[ManoRusso]

Hey guys! I'm creating some 3D models for GTA 5, and i'm looking to optimize they, so, I need to make LOD for my models, but i'm not being successful to do this. Idk how can I get this to work.

Can someone help me teaching how can I create LOD for my Models in 3DS Max and GIMSV?

Thanks!