SAP DMEE End Trailer Record

Hi,

Could you please let me know how to use an event in DMEE to generate a end trailer record with 2 segments?

The requirement is to create cross payment run media by combining more than 1 DME output but there should be only 1 end trailer record for the file.

I am thinking if this is only possible via an exit.

Please suggest the event and how this can be used in DMEE tree.

Thanks in advance,

Vamsi