You'll have to implement IModelReader interface and register it to BonzaiEngine singleton similarly to:
A basic implementation of IModelReader interface:
For static model, you'll have to create Mesh, GeometryData, VertexData, Material objects and store them in the model object.
There's some helpers for creating GeometryData/VertexData for converting various format of geometry and also generaing normals
GeometryIndexed.