ALE distribution is usually to have a 1:1 copy in a satellite system.
Based on the scenario, you are probably able to do a MM01 to extend the materials manually in your satellite.
I did something similar to your request in a data migration, but with an extra step in the middle, I sent an IDOC as file, used this as source in LSMW, added the extra segments via coding in the field mapping and then created a new IDOC for posting. see my blog: LSMW migration with IDOC method and using IDOC as source Part1: Extract by ALE
(however, it is not described there how to add the extra segments, just the general process)