Merging a file on PI server

Hi Folks,

I have another requirements plz guid me.

i have a scenario where i pick the multiple file and want to Merge a files into a single file and put on another ftp.

i made like that:

Sender CC pick *.txt file and create one message for each file and append at receiver side to a single file.

but i want to merge all file on PI means only one message should create and post a single file only rather than going for append mood

i m also using FCC for both end.

Regards,

Gagandeep.