Adding New Field in MB51

Dear All,

Requirement is to add new field 'Ship-to Country' in standard report RM07DOCS (MB51) , How can I go about it ?

1) Updating the enhancement points which exists in the report ?

2) Raising Query in SAP to get any OSS notes

3) Copy the standard RM07DOCS into Z Program and add this new field ?

Kindly suggest the best method asap.

Thanks

Nav.