Converting rigid_v2 with RVM2 to DAE
Import DAE in 3ds max
using that skeleton from the original file for a new, made by myself model
Exporting model with the plugin to CS2
use BOB to make it back to rigid

Anyone has a better workflow?
Oh, and, I have 2016 max version, official exporter does not work for me. Does anyone have a version that will work for 3ds max 2016?