Switching scene in a script from command line execution

Hi,

The context is video game usage export on a server. For this I need to switch scene from the script to make different kind of export.

In the 2.49 it works but i can’t find a way to do it with 2.58 version.
First I used:

scene = bpy.data.scenes[“BugMultiMaterial”]
bpy.data.screens[0].scene = scene

but it does not make my scene active.

I tried with the -S switch from command line but I still not scene I want to be active.

Scene switch: ‘BugMultiMaterial’ in file: ‘/home/trigrou/dev/osgexport/b25/test/test.blend’
current scene ‘Geometry’

Any hints ?