ID3DXMesh or D3DXFRAME Hierarchy to collision shapes

[lucky7456969]

I am currently making an application which uses bullet as the physics engine.
I am wondering how I can pass a ID3DXMesh or Frame Hierarchy to bullet
as a parameter so that the collision shapes creation process can be automated.
I am sure someone has implemented that before and hope that he/she may give me
some pointers on how to exchange data between these 2 systems?
I have been searching the net but didn't find much info from there.
Thanks
Jack