tag the relationship in “Requirements Traceability”

Hi,

i work with HPQC 10 Enterprise Edition as Project Administrator.
I would like to know, if it is possible to add a column at the “Requirements Traceability”  on Tab: “Relationships”. I know there columns for “Req: Name”, “Trace Comment” and you can add columns with the “Select columns” button. (you can add columns there which are elements of the requirement object) 

But I want to have a new column where I can evaluate/tag the relationship and not the requirement object. Is this possible and please does anyone have an idea how to do?