Hi PaQ,

I would agree with Michael and suggest you try ViaCAD as your companion with MoI for shelling puposes. This program
uses ACIS kernel as opposed to Solidworks Parasolid....but it seems very good in the test I did. Alternatively, if you are
like me and also use Rhino we should have Shelling in V5...maybe an early beta will do the trick for you.

Good Luck !!