Depends how you have it currently setup, but in essence you are going to:
Add to NADAP as ED (NANSI:NUMTYP=ED,NUMSE=XXXX;)
Add to LCR as PNR number (LCDDI:TAB=PNR,ENTRY=XXXX,FRCT=YYYY;)
Add route choice if necessary (LCDDI:TAB=RCT,FRCT=YYYY,PRE=ZZZZ;)
This PRE will normally then be an RODDI...