It's really great that you can have multiple columns of fields with Forms2.0. However you can't do it with field sets.
![0EM50000000RPLC.jpg 0EM50000000RPLC.jpg](/t5/image/serverpage/image-id/24385iECAF049BED8F024E/image-size/large?v=v2&px=999)
The second thing you can't do is 2 fields on the left and 3 fields on the right. This would automatically result in 3 fields left and 2 fields right.