[Need help]Create a physic object with multiple meshes using compound shape

[Tường Thi Huỳnh Nguyễn]

Who can help me to show the best way to create an physic object with multiple collision shapes. 

For more specific, I have a pod file which contains multiple meshes inside and I want to create one physic object (scene object) that contains all the meshes It has in the pod file.

  I think if we create all physic objects for each mesh in pod file is not good (because of memory problem with a pod file contains so many meshes), 

  I just need to create a physic scene object that have many collision shapes stay in one rigidbody.

Any one has the solution ?  I really need help

Thanks