Adding Header in Appended File

Hello All,

   I have build a scenario SuccessFactors to File. Since i am sending the 200 MB of xml data to the file i have choosen append mode.

   Here i have a challenge of adding header line to appended file.

   I am planning to develop 2 interfaces. one is for appending the file without header line. This is done.

   in Second interface i am planning to add header line to the appended file.

   Can anyone help me to build the second interface to add header line to the output appended file which is present in FTP folder.

   Header will be like below  

  "NOTACTIVE","STUD_ID","FNAME","LNAME","MI","GENDER","JP_ID","JP_DESC","JOB_TITLE","ORG_ID"

   If anyone has any other approach kindly in terms of design kindly let me know.

   I am on PI 7.0 version.

Thanks,

Bhaskar