OPIM - BOM - pipe length units in multiple reports

Hi, 

I am specifying an ISO style including pipe cut piece list. My questions is how to have different pipe length units in two report. In bulk MTO, I want pipe length to be meter and in cut piece list, pipe length to be millimeter. Is this doable?

and when specified multi columns for a report, the column header can also be multiplied to second column?

Thanks,

Maggie