Material Layering when imported


I have just started using D5 this past week, and have to say it is an amazing technology and I look forward to future updates! As a Rhino user, until there is an active live sync I have some questions regarding the direct import. When I import my Rhino files in D5, I have noticed the objects in the scene are regrouped by their layer color, and not by the layer organization in my rhino document.

So I know going forward, what would be the best way to isolate all scene geomtries after importing from Rhino?

Thank you!