The only way to control the lighting of a model is in Alibre Photorender, which is a graphics program for photorealistic rendering of parts/assemblies. The "lighting" you see in Part/Assembly/Sheet Metal cannot be changed in terms of its orientation. You can however change the how the light is...
I suggest checking out the Alibre Design Automation (API) section of the User Forum, where some users have posted some samples, questions, and comments.
https://www.alibre.com/forums/viewforum.php?f=13
Alibre is not optimized to use the dual processors, so the advantage is minimal due to how Windows naturally allocates the instructions between the processors.