Adding extension fields - Export Opportunities (hyperlink) - Mass Data Maintenance

Hi Experts,

We need to mass update extension fields in a C4C Opportunity.

Mass Data Maintenance work center -> Export Opportunities link-> New Pop up window -> Additional Fields (enter Selection criteria) -> Results table with all Opportunity fields displayed in columns

Not all extension fields of this Opportunity are displayed in the results when the system returns the data based on the selection criteria entered (example: enter Oppt status as WIP in selection criteria, to display the list of all opportunities with custom status 'WIP' along with the field values displayed in columns)

What would be the best approach to add the required Opportunity extension fields in the results table (pop up window) so that the required field values can be exported into a .CSV file to be edited there ?

Kind Regards

Reddy