I made an updated guide for adding new models to R2 because the old one was missing many pictures
Heres the guides
Part 1) Setting up max and rigging
https://youtu.be/0YL21pIzxoA
Part 2) Bob and variantmeshs
https://www.youtube.com/watch?v=74Af_mn71-g
hope this helps for new players looking into this