RQM Excel Importer - Link Test case to Test script

Hi,
 
   I need to link test case to test script while importing test cases and test script using the excel importer utility.   The problem is Test case Name / Test script Name / Test case description/ test script description are captured in separate column ( the contents are not same)  . Due to this i am unable to use the  "testcase.dc.title=testscript.dc.title" option to link  test case to test script. there is only one test script for a particular test case in single excel.
 i have gone though the sample cfg files available and could not find any useful suggestion.

Please suggest.

Thanks