The best is to use Google sketchup PRO and export in DWG file.
SolidWorks can than this file import and convert to any other file.
I have try RHINO too, Rhino can import skp files but not very good.
Exported files in DWG are good but sometime solidworks can not very good convert this files, like be this model here, there is lot of work to do ( repairs )

PS : you have a new e-mail.

Thanks
i will read my email
ok