Two column reporting in subreport

[ShortyA]

Hi,
I am using CRD XI R2 and have a subreport. The output is going to be split across two columns going down the left and then down the right column after that.

Page 1
Header
Summary block
Subreport-Shorty
Col 1 Col 2
Value 1 Value 4
Value 2 Value 5
Value 3 Value 6
End of Page 1

Page 2
Subreport-Shorty
Col 1 Col 2
Value 7 Value 8
Value 9 Value 10

This would be simple to do via the Section Expert BUT the page that the subreport sits on has variable free space. When the end of the first page of the main report is hit they want it to continue on Col 1 and split the values equally across the two columns.

Has anyone done this before? I have suggested running the layout as "Across then down" but they do not want that.

Thanks for any help as this is proving a bit of a challenge.
ShortyA