Can anyone please suggest, the best place to get iFIlters for .DGN, .DWGand .DXF................???There are couple of sites offering these, I would just like to know therecommendations.
Have you tried Grouping the view on content type?
You could create a calculated field in your list that concatenatesthe product type and the content type:CONCATENATE([ProductType]," - ",[Content Type])Then use this field in your filter