ZIP FileName (Additional Files)

Hi, My sender FTP channel picks two files Main& Additional file suing adavanced options and zips it using Payloadzipbean and writes to the target without any mapping,however the name inside the zipped file is "MainDocument & File"

How can i get the original file name as in the source directory inside my zipped file? I think I need a module for this but not sure how to access the source filenames inside the module any help would be greatly appreciated.

Thanks,